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Finding the Fourth Proportional to 18,005.70, 27,008.55 and 17,400.90

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Solution

The fourth proportional to 18,005.70, 27,008.55 and 17,400.90 is: 26,101.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.70 : 27,008.55 = 17,400.90 : x
  2. Step 2: Convert to fraction form
    18,005.70/27,008.55 = 17,400.90/x
  3. Step 3: Cross multiply
    18,005.70x = 27,008.55 × 17,400.90
  4. Step 4: Simplify right side
    18,005.70x = 469,973,077.70
  5. Step 5: Solve for x
    x = 469,973,077.70/18,005.70
  6. Step 6: Final answer
    x = 26,101.35

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1.5x scale

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.