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Finding the Fourth Proportional to 18,830.66, 25,987.13 and 11,278.22

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Solution

The fourth proportional to 18,830.66, 25,987.13 and 11,278.22 is: 15,564.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.66 : 25,987.13 = 11,278.22 : x
  2. Step 2: Convert to fraction form
    18,830.66/25,987.13 = 11,278.22/x
  3. Step 3: Cross multiply
    18,830.66x = 25,987.13 × 11,278.22
  4. Step 4: Simplify right side
    18,830.66x = 293,088,569.31
  5. Step 5: Solve for x
    x = 293,088,569.31/18,830.66
  6. Step 6: Final answer
    x = 15,564.43

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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.