Home / 15,134.68-20,885.46-8,420.32

Finding the Fourth Proportional to 15,134.68, 20,885.46 and 8,420.32

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Solution

The fourth proportional to 15,134.68, 20,885.46 and 8,420.32 is: 11,619.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134.68 : 20,885.46 = 8,420.32 : x
  2. Step 2: Convert to fraction form
    15,134.68/20,885.46 = 8,420.32/x
  3. Step 3: Cross multiply
    15,134.68x = 20,885.46 × 8,420.32
  4. Step 4: Simplify right side
    15,134.68x = 175,862,256.55
  5. Step 5: Solve for x
    x = 175,862,256.55/15,134.68
  6. Step 6: Final answer
    x = 11,619.82

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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.