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Finding the Fourth Proportional to 10,660.80, 16,010.40 and 10,315.20

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Solution

The fourth proportional to 10,660.80, 16,010.40 and 10,315.20 is: 15,491.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,660.80 : 16,010.40 = 10,315.20 : x
  2. Step 2: Convert to fraction form
    10,660.80/16,010.40 = 10,315.20/x
  3. Step 3: Cross multiply
    10,660.80x = 16,010.40 × 10,315.20
  4. Step 4: Simplify right side
    10,660.80x = 165,150,478.08
  5. Step 5: Solve for x
    x = 165,150,478.08/10,660.80
  6. Step 6: Final answer
    x = 15,491.38

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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.