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Finding the Fourth Proportional to 20,869.44, 28,800.72 and 12,484.32

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Solution

The fourth proportional to 20,869.44, 28,800.72 and 12,484.32 is: 17,228.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.44 : 28,800.72 = 12,484.32 : x
  2. Step 2: Convert to fraction form
    20,869.44/28,800.72 = 12,484.32/x
  3. Step 3: Cross multiply
    20,869.44x = 28,800.72 × 12,484.32
  4. Step 4: Simplify right side
    20,869.44x = 359,557,404.71
  5. Step 5: Solve for x
    x = 359,557,404.71/20,869.44
  6. Step 6: Final answer
    x = 17,228.90

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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.