Home / 15,833.61-21,851.37-9,120.20

Finding the Fourth Proportional to 15,833.61, 21,851.37 and 9,120.20

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Solution

The fourth proportional to 15,833.61, 21,851.37 and 9,120.20 is: 12,586.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,833.61 : 21,851.37 = 9,120.20 : x
  2. Step 2: Convert to fraction form
    15,833.61/21,851.37 = 9,120.20/x
  3. Step 3: Cross multiply
    15,833.61x = 21,851.37 × 9,120.20
  4. Step 4: Simplify right side
    15,833.61x = 199,288,755.42
  5. Step 5: Solve for x
    x = 199,288,755.42/15,833.61
  6. Step 6: Final answer
    x = 12,586.44

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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.