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Finding the Fourth Proportional to 18,878.99, 26,053.10 and 10,381.66

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Solution

The fourth proportional to 18,878.99, 26,053.10 and 10,381.66 is: 14,326.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.99 : 26,053.10 = 10,381.66 : x
  2. Step 2: Convert to fraction form
    18,878.99/26,053.10 = 10,381.66/x
  3. Step 3: Cross multiply
    18,878.99x = 26,053.10 × 10,381.66
  4. Step 4: Simplify right side
    18,878.99x = 270,474,426.15
  5. Step 5: Solve for x
    x = 270,474,426.15/18,878.99
  6. Step 6: Final answer
    x = 14,326.74

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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.