Home / 28,434.03-39,240.13-15,688.68

Finding the Fourth Proportional to 28,434.03, 39,240.13 and 15,688.68

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Solution

The fourth proportional to 28,434.03, 39,240.13 and 15,688.68 is: 21,651.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.03 : 39,240.13 = 15,688.68 : x
  2. Step 2: Convert to fraction form
    28,434.03/39,240.13 = 15,688.68/x
  3. Step 3: Cross multiply
    28,434.03x = 39,240.13 × 15,688.68
  4. Step 4: Simplify right side
    28,434.03x = 615,625,901.61
  5. Step 5: Solve for x
    x = 615,625,901.61/28,434.03
  6. Step 6: Final answer
    x = 21,651.02

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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.