Home / 15,102.28-20,836.12-9,131.68

Finding the Fourth Proportional to 15,102.28, 20,836.12 and 9,131.68

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Solution

The fourth proportional to 15,102.28, 20,836.12 and 9,131.68 is: 12,598.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,102.28 : 20,836.12 = 9,131.68 : x
  2. Step 2: Convert to fraction form
    15,102.28/20,836.12 = 9,131.68/x
  3. Step 3: Cross multiply
    15,102.28x = 20,836.12 × 9,131.68
  4. Step 4: Simplify right side
    15,102.28x = 190,268,780.28
  5. Step 5: Solve for x
    x = 190,268,780.28/15,102.28
  6. Step 6: Final answer
    x = 12,598.68

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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.