Home / 15,663.20-21,614.80-9,289.76

Finding the Fourth Proportional to 15,663.20, 21,614.80 and 9,289.76

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Solution

The fourth proportional to 15,663.20, 21,614.80 and 9,289.76 is: 12,819.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.20 : 21,614.80 = 9,289.76 : x
  2. Step 2: Convert to fraction form
    15,663.20/21,614.80 = 9,289.76/x
  3. Step 3: Cross multiply
    15,663.20x = 21,614.80 × 9,289.76
  4. Step 4: Simplify right side
    15,663.20x = 200,796,304.45
  5. Step 5: Solve for x
    x = 200,796,304.45/15,663.20
  6. Step 6: Final answer
    x = 12,819.62

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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.