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Finding the Fourth Proportional to 9,718.91, 14,502.55 and 8,671.72

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Solution

The fourth proportional to 9,718.91, 14,502.55 and 8,671.72 is: 12,939.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,718.91 : 14,502.55 = 8,671.72 : x
  2. Step 2: Convert to fraction form
    9,718.91/14,502.55 = 8,671.72/x
  3. Step 3: Cross multiply
    9,718.91x = 14,502.55 × 8,671.72
  4. Step 4: Simplify right side
    9,718.91x = 125,761,994.95
  5. Step 5: Solve for x
    x = 125,761,994.95/9,718.91
  6. Step 6: Final answer
    x = 12,939.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.