Home / 18,139.68-25,044.72-11,428.32

Finding the Fourth Proportional to 18,139.68, 25,044.72 and 11,428.32

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Solution

The fourth proportional to 18,139.68, 25,044.72 and 11,428.32 is: 15,778.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.68 : 25,044.72 = 11,428.32 : x
  2. Step 2: Convert to fraction form
    18,139.68/25,044.72 = 11,428.32/x
  3. Step 3: Cross multiply
    18,139.68x = 25,044.72 × 11,428.32
  4. Step 4: Simplify right side
    18,139.68x = 286,219,074.47
  5. Step 5: Solve for x
    x = 286,219,074.47/18,139.68
  6. Step 6: Final answer
    x = 15,778.62

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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.