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Finding the Fourth Proportional to 26,670.71, 40,017.74 and 12,640.76

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Solution

The fourth proportional to 26,670.71, 40,017.74 and 12,640.76 is: 18,966.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,670.71 : 40,017.74 = 12,640.76 : x
  2. Step 2: Convert to fraction form
    26,670.71/40,017.74 = 12,640.76/x
  3. Step 3: Cross multiply
    26,670.71x = 40,017.74 × 12,640.76
  4. Step 4: Simplify right side
    26,670.71x = 505,854,383.79
  5. Step 5: Solve for x
    x = 505,854,383.79/26,670.71
  6. Step 6: Final answer
    x = 18,966.66

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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.