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Finding the Fourth Proportional to 21,767.76, 32,647.79 and 9,918.89

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Solution

The fourth proportional to 21,767.76, 32,647.79 and 9,918.89 is: 14,876.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,767.76 : 32,647.79 = 9,918.89 : x
  2. Step 2: Convert to fraction form
    21,767.76/32,647.79 = 9,918.89/x
  3. Step 3: Cross multiply
    21,767.76x = 32,647.79 × 9,918.89
  4. Step 4: Simplify right side
    21,767.76x = 323,829,624.92
  5. Step 5: Solve for x
    x = 323,829,624.92/21,767.76
  6. Step 6: Final answer
    x = 14,876.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.