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Finding the Fourth Proportional to 24,438.40, 36,700.80 and 18,905.20

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Solution

The fourth proportional to 24,438.40, 36,700.80 and 18,905.20 is: 28,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    24,438.40 : 36,700.80 = 18,905.20 : x
  2. Step 2: Convert to fraction form
    24,438.40/36,700.80 = 18,905.20/x
  3. Step 3: Cross multiply
    24,438.40x = 36,700.80 × 18,905.20
  4. Step 4: Simplify right side
    24,438.40x = 693,835,964.16
  5. Step 5: Solve for x
    x = 693,835,964.16/24,438.40
  6. Step 6: Final answer
    x = 28,391.22

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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.