Home / 15,489.67-21,376.19-8,775.30

Finding the Fourth Proportional to 15,489.67, 21,376.19 and 8,775.30

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Solution

The fourth proportional to 15,489.67, 21,376.19 and 8,775.30 is: 12,110.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.67 : 21,376.19 = 8,775.30 : x
  2. Step 2: Convert to fraction form
    15,489.67/21,376.19 = 8,775.30/x
  3. Step 3: Cross multiply
    15,489.67x = 21,376.19 × 8,775.30
  4. Step 4: Simplify right side
    15,489.67x = 187,582,480.11
  5. Step 5: Solve for x
    x = 187,582,480.11/15,489.67
  6. Step 6: Final answer
    x = 12,110.17

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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.