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Finding the Fourth Proportional to 19,416.76, 26,785 and 12,242.78

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Solution

The fourth proportional to 19,416.76, 26,785 and 12,242.78 is: 16,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,416.76 : 26,785 = 12,242.78 : x
  2. Step 2: Convert to fraction form
    19,416.76/26,785 = 12,242.78/x
  3. Step 3: Cross multiply
    19,416.76x = 26,785 × 12,242.78
  4. Step 4: Simplify right side
    19,416.76x = 327,922,862.30
  5. Step 5: Solve for x
    x = 327,922,862.30/19,416.76
  6. Step 6: Final answer
    x = 16,888.65

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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.