Home / 20,943.08-28,902-11,511.88

Finding the Fourth Proportional to 20,943.08, 28,902 and 11,511.88

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Solution

The fourth proportional to 20,943.08, 28,902 and 11,511.88 is: 15,886.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.08 : 28,902 = 11,511.88 : x
  2. Step 2: Convert to fraction form
    20,943.08/28,902 = 11,511.88/x
  3. Step 3: Cross multiply
    20,943.08x = 28,902 × 11,511.88
  4. Step 4: Simplify right side
    20,943.08x = 332,716,355.76
  5. Step 5: Solve for x
    x = 332,716,355.76/20,943.08
  6. Step 6: Final answer
    x = 15,886.70

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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.