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Finding the Fourth Proportional to 20,358.74, 30,557.55 and 12,582.74

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Solution

The fourth proportional to 20,358.74, 30,557.55 and 12,582.74 is: 18,886.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.74 : 30,557.55 = 12,582.74 : x
  2. Step 2: Convert to fraction form
    20,358.74/30,557.55 = 12,582.74/x
  3. Step 3: Cross multiply
    20,358.74x = 30,557.55 × 12,582.74
  4. Step 4: Simplify right side
    20,358.74x = 384,497,706.69
  5. Step 5: Solve for x
    x = 384,497,706.69/20,358.74
  6. Step 6: Final answer
    x = 18,886.12

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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.