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Finding the Fourth Proportional to 10,545.80, 15,810.70 and 5,355.40

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Solution

The fourth proportional to 10,545.80, 15,810.70 and 5,355.40 is: 8,029.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,545.80 : 15,810.70 = 5,355.40 : x
  2. Step 2: Convert to fraction form
    10,545.80/15,810.70 = 5,355.40/x
  3. Step 3: Cross multiply
    10,545.80x = 15,810.70 × 5,355.40
  4. Step 4: Simplify right side
    10,545.80x = 84,672,622.78
  5. Step 5: Solve for x
    x = 84,672,622.78/10,545.80
  6. Step 6: Final answer
    x = 8,029.04

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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.