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Finding the Fourth Proportional to 9,000.81, 12,421.10 and 5,021.88

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Solution

The fourth proportional to 9,000.81, 12,421.10 and 5,021.88 is: 6,930.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000.81 : 12,421.10 = 5,021.88 : x
  2. Step 2: Convert to fraction form
    9,000.81/12,421.10 = 5,021.88/x
  3. Step 3: Cross multiply
    9,000.81x = 12,421.10 × 5,021.88
  4. Step 4: Simplify right side
    9,000.81x = 62,377,248.56
  5. Step 5: Solve for x
    x = 62,377,248.56/9,000.81
  6. Step 6: Final answer
    x = 6,930.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.