Home / 28,427.59-39,230.39-15,681.34

Finding the Fourth Proportional to 28,427.59, 39,230.39 and 15,681.34

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Solution

The fourth proportional to 28,427.59, 39,230.39 and 15,681.34 is: 21,640.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.59 : 39,230.39 = 15,681.34 : x
  2. Step 2: Convert to fraction form
    28,427.59/39,230.39 = 15,681.34/x
  3. Step 3: Cross multiply
    28,427.59x = 39,230.39 × 15,681.34
  4. Step 4: Simplify right side
    28,427.59x = 615,185,083.92
  5. Step 5: Solve for x
    x = 615,185,083.92/28,427.59
  6. Step 6: Final answer
    x = 21,640.42

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Half scale
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Double scale
Find fourth proportional to 28,428.59, 39,231.77 and 15,682.34
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.