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Finding the Fourth Proportional to 10,324.80, 15,487.20 and 9,709.20

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Solution

The fourth proportional to 10,324.80, 15,487.20 and 9,709.20 is: 14,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,324.80 : 15,487.20 = 9,709.20 : x
  2. Step 2: Convert to fraction form
    10,324.80/15,487.20 = 9,709.20/x
  3. Step 3: Cross multiply
    10,324.80x = 15,487.20 × 9,709.20
  4. Step 4: Simplify right side
    10,324.80x = 150,368,322.24
  5. Step 5: Solve for x
    x = 150,368,322.24/10,324.80
  6. Step 6: Final answer
    x = 14,563.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.