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Finding the Fourth Proportional to 18,005.40, 27,008.10 and 4,859.10

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Solution

The fourth proportional to 18,005.40, 27,008.10 and 4,859.10 is: 7,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.40 : 27,008.10 = 4,859.10 : x
  2. Step 2: Convert to fraction form
    18,005.40/27,008.10 = 4,859.10/x
  3. Step 3: Cross multiply
    18,005.40x = 27,008.10 × 4,859.10
  4. Step 4: Simplify right side
    18,005.40x = 131,235,058.71
  5. Step 5: Solve for x
    x = 131,235,058.71/18,005.40
  6. Step 6: Final answer
    x = 7,288.65

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Similar ratio
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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.