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Finding the Fourth Proportional to 20,710.84, 30,916.10 and 19,169.14

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Solution

The fourth proportional to 20,710.84, 30,916.10 and 19,169.14 is: 28,614.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.84 : 30,916.10 = 19,169.14 : x
  2. Step 2: Convert to fraction form
    20,710.84/30,916.10 = 19,169.14/x
  3. Step 3: Cross multiply
    20,710.84x = 30,916.10 × 19,169.14
  4. Step 4: Simplify right side
    20,710.84x = 592,635,049.15
  5. Step 5: Solve for x
    x = 592,635,049.15/20,710.84
  6. Step 6: Final answer
    x = 28,614.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.