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Finding the Fourth Proportional to 13,951.65, 20,929.42 and 7,378.30

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Solution

The fourth proportional to 13,951.65, 20,929.42 and 7,378.30 is: 11,068.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,951.65 : 20,929.42 = 7,378.30 : x
  2. Step 2: Convert to fraction form
    13,951.65/20,929.42 = 7,378.30/x
  3. Step 3: Cross multiply
    13,951.65x = 20,929.42 × 7,378.30
  4. Step 4: Simplify right side
    13,951.65x = 154,423,574.97
  5. Step 5: Solve for x
    x = 154,423,574.97/13,951.65
  6. Step 6: Final answer
    x = 11,068.48

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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.