Home / 13,979.47-19,291.56-7,930.87

Finding the Fourth Proportional to 13,979.47, 19,291.56 and 7,930.87

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Solution

The fourth proportional to 13,979.47, 19,291.56 and 7,930.87 is: 10,944.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.47 : 19,291.56 = 7,930.87 : x
  2. Step 2: Convert to fraction form
    13,979.47/19,291.56 = 7,930.87/x
  3. Step 3: Cross multiply
    13,979.47x = 19,291.56 × 7,930.87
  4. Step 4: Simplify right side
    13,979.47x = 152,998,854.46
  5. Step 5: Solve for x
    x = 152,998,854.46/13,979.47
  6. Step 6: Final answer
    x = 10,944.54

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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.