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Finding the Fourth Proportional to 15,866.76, 21,897.36 and 8,793.84

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Solution

The fourth proportional to 15,866.76, 21,897.36 and 8,793.84 is: 12,136.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.76 : 21,897.36 = 8,793.84 : x
  2. Step 2: Convert to fraction form
    15,866.76/21,897.36 = 8,793.84/x
  3. Step 3: Cross multiply
    15,866.76x = 21,897.36 × 8,793.84
  4. Step 4: Simplify right side
    15,866.76x = 192,561,880.26
  5. Step 5: Solve for x
    x = 192,561,880.26/15,866.76
  6. Step 6: Final answer
    x = 12,136.18

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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.