Home / 28,432.37-39,236.94-15,686.12

Finding the Fourth Proportional to 28,432.37, 39,236.94 and 15,686.12

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Solution

The fourth proportional to 28,432.37, 39,236.94 and 15,686.12 is: 21,646.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,432.37 : 39,236.94 = 15,686.12 : x
  2. Step 2: Convert to fraction form
    28,432.37/39,236.94 = 15,686.12/x
  3. Step 3: Cross multiply
    28,432.37x = 39,236.94 × 15,686.12
  4. Step 4: Simplify right side
    28,432.37x = 615,475,153.09
  5. Step 5: Solve for x
    x = 615,475,153.09/28,432.37
  6. Step 6: Final answer
    x = 21,646.99

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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.