Home / 10,979.51-15,160.46-10,139.91

Finding the Fourth Proportional to 10,979.51, 15,160.46 and 10,139.91

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Solution

The fourth proportional to 10,979.51, 15,160.46 and 10,139.91 is: 14,001.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.51 : 15,160.46 = 10,139.91 : x
  2. Step 2: Convert to fraction form
    10,979.51/15,160.46 = 10,139.91/x
  3. Step 3: Cross multiply
    10,979.51x = 15,160.46 × 10,139.91
  4. Step 4: Simplify right side
    10,979.51x = 153,725,699.96
  5. Step 5: Solve for x
    x = 153,725,699.96/10,979.51
  6. Step 6: Final answer
    x = 14,001.14

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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.