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Finding the Fourth Proportional to 26,981.91, 40,472.91 and 8,261.87

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Solution

The fourth proportional to 26,981.91, 40,472.91 and 8,261.87 is: 12,392.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,981.91 : 40,472.91 = 8,261.87 : x
  2. Step 2: Convert to fraction form
    26,981.91/40,472.91 = 8,261.87/x
  3. Step 3: Cross multiply
    26,981.91x = 40,472.91 × 8,261.87
  4. Step 4: Simplify right side
    26,981.91x = 334,381,718.58
  5. Step 5: Solve for x
    x = 334,381,718.58/26,981.91
  6. Step 6: Final answer
    x = 12,392.81

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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.