Home / 15,820.80-23,731.20-9,915.90

Finding the Fourth Proportional to 15,820.80, 23,731.20 and 9,915.90

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Solution

The fourth proportional to 15,820.80, 23,731.20 and 9,915.90 is: 14,873.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.80 : 23,731.20 = 9,915.90 : x
  2. Step 2: Convert to fraction form
    15,820.80/23,731.20 = 9,915.90/x
  3. Step 3: Cross multiply
    15,820.80x = 23,731.20 × 9,915.90
  4. Step 4: Simplify right side
    15,820.80x = 235,316,206.08
  5. Step 5: Solve for x
    x = 235,316,206.08/15,820.80
  6. Step 6: Final answer
    x = 14,873.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.