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Finding the Fourth Proportional to 7,886.68, 10,890.17 and 7,045.90

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Solution

The fourth proportional to 7,886.68, 10,890.17 and 7,045.90 is: 9,729.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886.68 : 10,890.17 = 7,045.90 : x
  2. Step 2: Convert to fraction form
    7,886.68/10,890.17 = 7,045.90/x
  3. Step 3: Cross multiply
    7,886.68x = 10,890.17 × 7,045.90
  4. Step 4: Simplify right side
    7,886.68x = 76,731,048.80
  5. Step 5: Solve for x
    x = 76,731,048.80/7,886.68
  6. Step 6: Final answer
    x = 9,729.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.