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Finding the Fourth Proportional to 28,545.54, 42,807.66 and 9,820.28

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Solution

The fourth proportional to 28,545.54, 42,807.66 and 9,820.28 is: 14,726.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,545.54 : 42,807.66 = 9,820.28 : x
  2. Step 2: Convert to fraction form
    28,545.54/42,807.66 = 9,820.28/x
  3. Step 3: Cross multiply
    28,545.54x = 42,807.66 × 9,820.28
  4. Step 4: Simplify right side
    28,545.54x = 420,383,207.34
  5. Step 5: Solve for x
    x = 420,383,207.34/28,545.54
  6. Step 6: Final answer
    x = 14,726.76

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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.