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Finding the Fourth Proportional to 21,063.70, 29,067.98 and 11,503.68

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Solution

The fourth proportional to 21,063.70, 29,067.98 and 11,503.68 is: 15,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.70 : 29,067.98 = 11,503.68 : x
  2. Step 2: Convert to fraction form
    21,063.70/29,067.98 = 11,503.68/x
  3. Step 3: Cross multiply
    21,063.70x = 29,067.98 × 11,503.68
  4. Step 4: Simplify right side
    21,063.70x = 334,388,740.17
  5. Step 5: Solve for x
    x = 334,388,740.17/21,063.70
  6. Step 6: Final answer
    x = 15,875.12

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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.