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Finding the Fourth Proportional to 8,930.16, 12,320.31 and 5,392.08

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Solution

The fourth proportional to 8,930.16, 12,320.31 and 5,392.08 is: 7,439.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,930.16 : 12,320.31 = 5,392.08 : x
  2. Step 2: Convert to fraction form
    8,930.16/12,320.31 = 5,392.08/x
  3. Step 3: Cross multiply
    8,930.16x = 12,320.31 × 5,392.08
  4. Step 4: Simplify right side
    8,930.16x = 66,432,097.14
  5. Step 5: Solve for x
    x = 66,432,097.14/8,930.16
  6. Step 6: Final answer
    x = 7,439.07

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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.