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Finding the Fourth Proportional to 15,834.21, 21,851.55 and 8,761.11

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Solution

The fourth proportional to 15,834.21, 21,851.55 and 8,761.11 is: 12,090.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,834.21 : 21,851.55 = 8,761.11 : x
  2. Step 2: Convert to fraction form
    15,834.21/21,851.55 = 8,761.11/x
  3. Step 3: Cross multiply
    15,834.21x = 21,851.55 × 8,761.11
  4. Step 4: Simplify right side
    15,834.21x = 191,443,833.22
  5. Step 5: Solve for x
    x = 191,443,833.22/15,834.21
  6. Step 6: Final answer
    x = 12,090.52

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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.