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Finding the Fourth Proportional to 18,572.88, 27,870.12 and 7,480.56

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Solution

The fourth proportional to 18,572.88, 27,870.12 and 7,480.56 is: 11,225.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.88 : 27,870.12 = 7,480.56 : x
  2. Step 2: Convert to fraction form
    18,572.88/27,870.12 = 7,480.56/x
  3. Step 3: Cross multiply
    18,572.88x = 27,870.12 × 7,480.56
  4. Step 4: Simplify right side
    18,572.88x = 208,484,104.87
  5. Step 5: Solve for x
    x = 208,484,104.87/18,572.88
  6. Step 6: Final answer
    x = 11,225.19

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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.