Home / 20,779.60-31,158.32-9,079.12

Finding the Fourth Proportional to 20,779.60, 31,158.32 and 9,079.12

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Solution

The fourth proportional to 20,779.60, 31,158.32 and 9,079.12 is: 13,613.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.60 : 31,158.32 = 9,079.12 : x
  2. Step 2: Convert to fraction form
    20,779.60/31,158.32 = 9,079.12/x
  3. Step 3: Cross multiply
    20,779.60x = 31,158.32 × 9,079.12
  4. Step 4: Simplify right side
    20,779.60x = 282,890,126.28
  5. Step 5: Solve for x
    x = 282,890,126.28/20,779.60
  6. Step 6: Final answer
    x = 13,613.84

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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.