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Finding the Fourth Proportional to 15,178.88, 22,758 and 5,312.72

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Solution

The fourth proportional to 15,178.88, 22,758 and 5,312.72 is: 7,965.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,178.88 : 22,758 = 5,312.72 : x
  2. Step 2: Convert to fraction form
    15,178.88/22,758 = 5,312.72/x
  3. Step 3: Cross multiply
    15,178.88x = 22,758 × 5,312.72
  4. Step 4: Simplify right side
    15,178.88x = 120,906,881.76
  5. Step 5: Solve for x
    x = 120,906,881.76/15,178.88
  6. Step 6: Final answer
    x = 7,965.47

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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.