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Finding the Fourth Proportional to 8,947.86, 12,343.74 and 5,360.40

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Solution

The fourth proportional to 8,947.86, 12,343.74 and 5,360.40 is: 7,394.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,947.86 : 12,343.74 = 5,360.40 : x
  2. Step 2: Convert to fraction form
    8,947.86/12,343.74 = 5,360.40/x
  3. Step 3: Cross multiply
    8,947.86x = 12,343.74 × 5,360.40
  4. Step 4: Simplify right side
    8,947.86x = 66,167,383.90
  5. Step 5: Solve for x
    x = 66,167,383.90/8,947.86
  6. Step 6: Final answer
    x = 7,394.77

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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.