Home / 15,489.18-21,375.02-8,774.15

Finding the Fourth Proportional to 15,489.18, 21,375.02 and 8,774.15

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Solution

The fourth proportional to 15,489.18, 21,375.02 and 8,774.15 is: 12,108.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.18 : 21,375.02 = 8,774.15 : x
  2. Step 2: Convert to fraction form
    15,489.18/21,375.02 = 8,774.15/x
  3. Step 3: Cross multiply
    15,489.18x = 21,375.02 × 8,774.15
  4. Step 4: Simplify right side
    15,489.18x = 187,547,480.99
  5. Step 5: Solve for x
    x = 187,547,480.99/15,489.18
  6. Step 6: Final answer
    x = 12,108.29

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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.