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Finding the Fourth Proportional to 10,472.80, 15,696.40 and 4,623.20

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Solution

The fourth proportional to 10,472.80, 15,696.40 and 4,623.20 is: 6,929.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,472.80 : 15,696.40 = 4,623.20 : x
  2. Step 2: Convert to fraction form
    10,472.80/15,696.40 = 4,623.20/x
  3. Step 3: Cross multiply
    10,472.80x = 15,696.40 × 4,623.20
  4. Step 4: Simplify right side
    10,472.80x = 72,567,596.48
  5. Step 5: Solve for x
    x = 72,567,596.48/10,472.80
  6. Step 6: Final answer
    x = 6,929.15

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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.