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Finding the Fourth Proportional to 18,642.16, 25,726.79 and 10,685.89

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Solution

The fourth proportional to 18,642.16, 25,726.79 and 10,685.89 is: 14,746.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.16 : 25,726.79 = 10,685.89 : x
  2. Step 2: Convert to fraction form
    18,642.16/25,726.79 = 10,685.89/x
  3. Step 3: Cross multiply
    18,642.16x = 25,726.79 × 10,685.89
  4. Step 4: Simplify right side
    18,642.16x = 274,913,465.93
  5. Step 5: Solve for x
    x = 274,913,465.93/18,642.16
  6. Step 6: Final answer
    x = 14,746.87

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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.