Home / 15,834.90-21,851.82-8,664.78

Finding the Fourth Proportional to 15,834.90, 21,851.82 and 8,664.78

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Solution

The fourth proportional to 15,834.90, 21,851.82 and 8,664.78 is: 11,957.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,834.90 : 21,851.82 = 8,664.78 : x
  2. Step 2: Convert to fraction form
    15,834.90/21,851.82 = 8,664.78/x
  3. Step 3: Cross multiply
    15,834.90x = 21,851.82 × 8,664.78
  4. Step 4: Simplify right side
    15,834.90x = 189,341,294.84
  5. Step 5: Solve for x
    x = 189,341,294.84/15,834.90
  6. Step 6: Final answer
    x = 11,957.22

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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.