Home / 15,399.76-21,253.68-8,687.50

Finding the Fourth Proportional to 15,399.76, 21,253.68 and 8,687.50

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Solution

The fourth proportional to 15,399.76, 21,253.68 and 8,687.50 is: 11,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.76 : 21,253.68 = 8,687.50 : x
  2. Step 2: Convert to fraction form
    15,399.76/21,253.68 = 8,687.50/x
  3. Step 3: Cross multiply
    15,399.76x = 21,253.68 × 8,687.50
  4. Step 4: Simplify right side
    15,399.76x = 184,641,345
  5. Step 5: Solve for x
    x = 184,641,345/15,399.76
  6. Step 6: Final answer
    x = 11,989.88

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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.