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Finding the Fourth Proportional to 15,343.80, 22,991.40 and 12,865.20

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Solution

The fourth proportional to 15,343.80, 22,991.40 and 12,865.20 is: 19,277.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,343.80 : 22,991.40 = 12,865.20 : x
  2. Step 2: Convert to fraction form
    15,343.80/22,991.40 = 12,865.20/x
  3. Step 3: Cross multiply
    15,343.80x = 22,991.40 × 12,865.20
  4. Step 4: Simplify right side
    15,343.80x = 295,788,959.28
  5. Step 5: Solve for x
    x = 295,788,959.28/15,343.80
  6. Step 6: Final answer
    x = 19,277.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.