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Finding the Fourth Proportional to 23,806.80, 32,869.80 and 15,865.20

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Solution

The fourth proportional to 23,806.80, 32,869.80 and 15,865.20 is: 21,904.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,806.80 : 32,869.80 = 15,865.20 : x
  2. Step 2: Convert to fraction form
    23,806.80/32,869.80 = 15,865.20/x
  3. Step 3: Cross multiply
    23,806.80x = 32,869.80 × 15,865.20
  4. Step 4: Simplify right side
    23,806.80x = 521,485,950.96
  5. Step 5: Solve for x
    x = 521,485,950.96/23,806.80
  6. Step 6: Final answer
    x = 21,904.92

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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.