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Finding the Fourth Proportional to 20,651, 28,498.24 and 11,219.56

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Solution

The fourth proportional to 20,651, 28,498.24 and 11,219.56 is: 15,482.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651 : 28,498.24 = 11,219.56 : x
  2. Step 2: Convert to fraction form
    20,651/28,498.24 = 11,219.56/x
  3. Step 3: Cross multiply
    20,651x = 28,498.24 × 11,219.56
  4. Step 4: Simplify right side
    20,651x = 319,737,713.57
  5. Step 5: Solve for x
    x = 319,737,713.57/20,651
  6. Step 6: Final answer
    x = 15,482.92

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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.