Home / 8,545.40-12,818.10-5,247.80

Finding the Fourth Proportional to 8,545.40, 12,818.10 and 5,247.80

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Solution

The fourth proportional to 8,545.40, 12,818.10 and 5,247.80 is: 7,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,545.40 : 12,818.10 = 5,247.80 : x
  2. Step 2: Convert to fraction form
    8,545.40/12,818.10 = 5,247.80/x
  3. Step 3: Cross multiply
    8,545.40x = 12,818.10 × 5,247.80
  4. Step 4: Simplify right side
    8,545.40x = 67,266,825.18
  5. Step 5: Solve for x
    x = 67,266,825.18/8,545.40
  6. Step 6: Final answer
    x = 7,871.70

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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.