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Finding the Fourth Proportional to 9,391.95, 12,963.65 and 5,415.66

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Solution

The fourth proportional to 9,391.95, 12,963.65 and 5,415.66 is: 7,475.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,391.95 : 12,963.65 = 5,415.66 : x
  2. Step 2: Convert to fraction form
    9,391.95/12,963.65 = 5,415.66/x
  3. Step 3: Cross multiply
    9,391.95x = 12,963.65 × 5,415.66
  4. Step 4: Simplify right side
    9,391.95x = 70,206,693.68
  5. Step 5: Solve for x
    x = 70,206,693.68/9,391.95
  6. Step 6: Final answer
    x = 7,475.20

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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.