Home / 13,979.06-19,290.66-7,691.40

Finding the Fourth Proportional to 13,979.06, 19,290.66 and 7,691.40

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Solution

The fourth proportional to 13,979.06, 19,290.66 and 7,691.40 is: 10,613.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.06 : 19,290.66 = 7,691.40 : x
  2. Step 2: Convert to fraction form
    13,979.06/19,290.66 = 7,691.40/x
  3. Step 3: Cross multiply
    13,979.06x = 19,290.66 × 7,691.40
  4. Step 4: Simplify right side
    13,979.06x = 148,372,182.32
  5. Step 5: Solve for x
    x = 148,372,182.32/13,979.06
  6. Step 6: Final answer
    x = 10,613.89

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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.