Home / 28,246.81-38,981.10-15,500.62

Finding the Fourth Proportional to 28,246.81, 38,981.10 and 15,500.62

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Solution

The fourth proportional to 28,246.81, 38,981.10 and 15,500.62 is: 21,391.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,246.81 : 38,981.10 = 15,500.62 : x
  2. Step 2: Convert to fraction form
    28,246.81/38,981.10 = 15,500.62/x
  3. Step 3: Cross multiply
    28,246.81x = 38,981.10 × 15,500.62
  4. Step 4: Simplify right side
    28,246.81x = 604,231,218.28
  5. Step 5: Solve for x
    x = 604,231,218.28/28,246.81
  6. Step 6: Final answer
    x = 21,391.13

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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.