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Finding the Fourth Proportional to 15,912.76, 21,957.76 and 8,838.04

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Solution

The fourth proportional to 15,912.76, 21,957.76 and 8,838.04 is: 12,195.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,912.76 : 21,957.76 = 8,838.04 : x
  2. Step 2: Convert to fraction form
    15,912.76/21,957.76 = 8,838.04/x
  3. Step 3: Cross multiply
    15,912.76x = 21,957.76 × 8,838.04
  4. Step 4: Simplify right side
    15,912.76x = 194,063,561.19
  5. Step 5: Solve for x
    x = 194,063,561.19/15,912.76
  6. Step 6: Final answer
    x = 12,195.47

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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.