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Finding the Fourth Proportional to 21,861.30, 32,780.67 and 7,068.30

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Solution

The fourth proportional to 21,861.30, 32,780.67 and 7,068.30 is: 10,598.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,861.30 : 32,780.67 = 7,068.30 : x
  2. Step 2: Convert to fraction form
    21,861.30/32,780.67 = 7,068.30/x
  3. Step 3: Cross multiply
    21,861.30x = 32,780.67 × 7,068.30
  4. Step 4: Simplify right side
    21,861.30x = 231,703,609.76
  5. Step 5: Solve for x
    x = 231,703,609.76/21,861.30
  6. Step 6: Final answer
    x = 10,598.80

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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.