Home / 21,779.10-32,679.45-8,631.90

Finding the Fourth Proportional to 21,779.10, 32,679.45 and 8,631.90

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Solution

The fourth proportional to 21,779.10, 32,679.45 and 8,631.90 is: 12,952.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.10 : 32,679.45 = 8,631.90 : x
  2. Step 2: Convert to fraction form
    21,779.10/32,679.45 = 8,631.90/x
  3. Step 3: Cross multiply
    21,779.10x = 32,679.45 × 8,631.90
  4. Step 4: Simplify right side
    21,779.10x = 282,085,744.46
  5. Step 5: Solve for x
    x = 282,085,744.46/21,779.10
  6. Step 6: Final answer
    x = 12,952.13

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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.