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Finding the Fourth Proportional to 8,920.10, 13,393.62 and 7,086.08

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Solution

The fourth proportional to 8,920.10, 13,393.62 and 7,086.08 is: 10,639.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.10 : 13,393.62 = 7,086.08 : x
  2. Step 2: Convert to fraction form
    8,920.10/13,393.62 = 7,086.08/x
  3. Step 3: Cross multiply
    8,920.10x = 13,393.62 × 7,086.08
  4. Step 4: Simplify right side
    8,920.10x = 94,908,195.84
  5. Step 5: Solve for x
    x = 94,908,195.84/8,920.10
  6. Step 6: Final answer
    x = 10,639.82

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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.