Home / 10,979.39-15,139.01-8,741.36

Finding the Fourth Proportional to 10,979.39, 15,139.01 and 8,741.36

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Solution

The fourth proportional to 10,979.39, 15,139.01 and 8,741.36 is: 12,053.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.39 : 15,139.01 = 8,741.36 : x
  2. Step 2: Convert to fraction form
    10,979.39/15,139.01 = 8,741.36/x
  3. Step 3: Cross multiply
    10,979.39x = 15,139.01 × 8,741.36
  4. Step 4: Simplify right side
    10,979.39x = 132,335,482.61
  5. Step 5: Solve for x
    x = 132,335,482.61/10,979.39
  6. Step 6: Final answer
    x = 12,053.09

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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.