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Finding the Fourth Proportional to 22,391.65, 30,900.47 and 12,319.88

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Solution

The fourth proportional to 22,391.65, 30,900.47 and 12,319.88 is: 17,001.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,391.65 : 30,900.47 = 12,319.88 : x
  2. Step 2: Convert to fraction form
    22,391.65/30,900.47 = 12,319.88/x
  3. Step 3: Cross multiply
    22,391.65x = 30,900.47 × 12,319.88
  4. Step 4: Simplify right side
    22,391.65x = 380,690,082.34
  5. Step 5: Solve for x
    x = 380,690,082.34/22,391.65
  6. Step 6: Final answer
    x = 17,001.43

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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.