Home / 15,343.20-21,172.80-9,053.28

Finding the Fourth Proportional to 15,343.20, 21,172.80 and 9,053.28

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Solution

The fourth proportional to 15,343.20, 21,172.80 and 9,053.28 is: 12,493.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,343.20 : 21,172.80 = 9,053.28 : x
  2. Step 2: Convert to fraction form
    15,343.20/21,172.80 = 9,053.28/x
  3. Step 3: Cross multiply
    15,343.20x = 21,172.80 × 9,053.28
  4. Step 4: Simplify right side
    15,343.20x = 191,683,286.78
  5. Step 5: Solve for x
    x = 191,683,286.78/15,343.20
  6. Step 6: Final answer
    x = 12,493.04

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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.