Home / 28,440.38-39,247.45-15,693.68

Finding the Fourth Proportional to 28,440.38, 39,247.45 and 15,693.68

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Solution

The fourth proportional to 28,440.38, 39,247.45 and 15,693.68 is: 21,657.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,440.38 : 39,247.45 = 15,693.68 : x
  2. Step 2: Convert to fraction form
    28,440.38/39,247.45 = 15,693.68/x
  3. Step 3: Cross multiply
    28,440.38x = 39,247.45 × 15,693.68
  4. Step 4: Simplify right side
    28,440.38x = 615,936,980.00
  5. Step 5: Solve for x
    x = 615,936,980.00/28,440.38
  6. Step 6: Final answer
    x = 21,657.13

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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.