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Finding the Fourth Proportional to 10,509.20, 15,763.80 and 9,414.80

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Solution

The fourth proportional to 10,509.20, 15,763.80 and 9,414.80 is: 14,122.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,509.20 : 15,763.80 = 9,414.80 : x
  2. Step 2: Convert to fraction form
    10,509.20/15,763.80 = 9,414.80/x
  3. Step 3: Cross multiply
    10,509.20x = 15,763.80 × 9,414.80
  4. Step 4: Simplify right side
    10,509.20x = 148,413,024.24
  5. Step 5: Solve for x
    x = 148,413,024.24/10,509.20
  6. Step 6: Final answer
    x = 14,122.20

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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.