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Finding the Fourth Proportional to 7,121.25, 10,681.92 and 1,927.17

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Solution

The fourth proportional to 7,121.25, 10,681.92 and 1,927.17 is: 2,890.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.25 : 10,681.92 = 1,927.17 : x
  2. Step 2: Convert to fraction form
    7,121.25/10,681.92 = 1,927.17/x
  3. Step 3: Cross multiply
    7,121.25x = 10,681.92 × 1,927.17
  4. Step 4: Simplify right side
    7,121.25x = 20,585,875.77
  5. Step 5: Solve for x
    x = 20,585,875.77/7,121.25
  6. Step 6: Final answer
    x = 2,890.77

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Double scale
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Similar ratio
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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.