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Finding the Fourth Proportional to 15,834.40, 21,851.16 and 8,761.12

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Solution

The fourth proportional to 15,834.40, 21,851.16 and 8,761.12 is: 12,090.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,834.40 : 21,851.16 = 8,761.12 : x
  2. Step 2: Convert to fraction form
    15,834.40/21,851.16 = 8,761.12/x
  3. Step 3: Cross multiply
    15,834.40x = 21,851.16 × 8,761.12
  4. Step 4: Simplify right side
    15,834.40x = 191,440,634.90
  5. Step 5: Solve for x
    x = 191,440,634.90/15,834.40
  6. Step 6: Final answer
    x = 12,090.17

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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.