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Finding the Fourth Proportional to 21,063.86, 29,068.13 and 11,503.88

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Solution

The fourth proportional to 21,063.86, 29,068.13 and 11,503.88 is: 15,875.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.86 : 29,068.13 = 11,503.88 : x
  2. Step 2: Convert to fraction form
    21,063.86/29,068.13 = 11,503.88/x
  3. Step 3: Cross multiply
    21,063.86x = 29,068.13 × 11,503.88
  4. Step 4: Simplify right side
    21,063.86x = 334,396,162.76
  5. Step 5: Solve for x
    x = 334,396,162.76/21,063.86
  6. Step 6: Final answer
    x = 15,875.35

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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.