Home / 18,428.88-25,431.30-10,875.70

Finding the Fourth Proportional to 18,428.88, 25,431.30 and 10,875.70

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Solution

The fourth proportional to 18,428.88, 25,431.30 and 10,875.70 is: 15,008.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.88 : 25,431.30 = 10,875.70 : x
  2. Step 2: Convert to fraction form
    18,428.88/25,431.30 = 10,875.70/x
  3. Step 3: Cross multiply
    18,428.88x = 25,431.30 × 10,875.70
  4. Step 4: Simplify right side
    18,428.88x = 276,583,221.20
  5. Step 5: Solve for x
    x = 276,583,221.20/18,428.88
  6. Step 6: Final answer
    x = 15,008.14

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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.