Home / 12,538.20-18,779.57-5,120.17

Finding the Fourth Proportional to 12,538.20, 18,779.57 and 5,120.17

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Solution

The fourth proportional to 12,538.20, 18,779.57 and 5,120.17 is: 7,668.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,538.20 : 18,779.57 = 5,120.17 : x
  2. Step 2: Convert to fraction form
    12,538.20/18,779.57 = 5,120.17/x
  3. Step 3: Cross multiply
    12,538.20x = 18,779.57 × 5,120.17
  4. Step 4: Simplify right side
    12,538.20x = 96,154,518.38
  5. Step 5: Solve for x
    x = 96,154,518.38/12,538.20
  6. Step 6: Final answer
    x = 7,668.93

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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.