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Finding the Fourth Proportional to 8,930.88, 12,312.92 and 7,685.30

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Solution

The fourth proportional to 8,930.88, 12,312.92 and 7,685.30 is: 10,595.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,930.88 : 12,312.92 = 7,685.30 : x
  2. Step 2: Convert to fraction form
    8,930.88/12,312.92 = 7,685.30/x
  3. Step 3: Cross multiply
    8,930.88x = 12,312.92 × 7,685.30
  4. Step 4: Simplify right side
    8,930.88x = 94,628,534.07
  5. Step 5: Solve for x
    x = 94,628,534.07/8,930.88
  6. Step 6: Final answer
    x = 10,595.66

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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.