Home / 13,979.04-19,291.04-7,691.20

Finding the Fourth Proportional to 13,979.04, 19,291.04 and 7,691.20

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Solution

The fourth proportional to 13,979.04, 19,291.04 and 7,691.20 is: 10,613.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.04 : 19,291.04 = 7,691.20 : x
  2. Step 2: Convert to fraction form
    13,979.04/19,291.04 = 7,691.20/x
  3. Step 3: Cross multiply
    13,979.04x = 19,291.04 × 7,691.20
  4. Step 4: Simplify right side
    13,979.04x = 148,371,246.85
  5. Step 5: Solve for x
    x = 148,371,246.85/13,979.04
  6. Step 6: Final answer
    x = 10,613.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.