Home / 10,931.52-15,086.88-9,998.40

Finding the Fourth Proportional to 10,931.52, 15,086.88 and 9,998.40

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Solution

The fourth proportional to 10,931.52, 15,086.88 and 9,998.40 is: 13,799.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.52 : 15,086.88 = 9,998.40 : x
  2. Step 2: Convert to fraction form
    10,931.52/15,086.88 = 9,998.40/x
  3. Step 3: Cross multiply
    10,931.52x = 15,086.88 × 9,998.40
  4. Step 4: Simplify right side
    10,931.52x = 150,844,660.99
  5. Step 5: Solve for x
    x = 150,844,660.99/10,931.52
  6. Step 6: Final answer
    x = 13,799.06

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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.