Home / 28,431.29-39,235.35-15,684.27

Finding the Fourth Proportional to 28,431.29, 39,235.35 and 15,684.27

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Solution

The fourth proportional to 28,431.29, 39,235.35 and 15,684.27 is: 21,644.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.29 : 39,235.35 = 15,684.27 : x
  2. Step 2: Convert to fraction form
    28,431.29/39,235.35 = 15,684.27/x
  3. Step 3: Cross multiply
    28,431.29x = 39,235.35 × 15,684.27
  4. Step 4: Simplify right side
    28,431.29x = 615,377,822.94
  5. Step 5: Solve for x
    x = 615,377,822.94/28,431.29
  6. Step 6: Final answer
    x = 21,644.39

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Half scale
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Double scale
Find fourth proportional to 28,432.29, 39,236.73 and 15,685.27
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.