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Finding the Fourth Proportional to 19,172.40, 28,731.60 and 15,230.40

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Solution

The fourth proportional to 19,172.40, 28,731.60 and 15,230.40 is: 22,824.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,172.40 : 28,731.60 = 15,230.40 : x
  2. Step 2: Convert to fraction form
    19,172.40/28,731.60 = 15,230.40/x
  3. Step 3: Cross multiply
    19,172.40x = 28,731.60 × 15,230.40
  4. Step 4: Simplify right side
    19,172.40x = 437,593,760.64
  5. Step 5: Solve for x
    x = 437,593,760.64/19,172.40
  6. Step 6: Final answer
    x = 22,824.15

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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.