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Finding the Fourth Proportional to 18,572.40, 27,859.91 and 7,479.14

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Solution

The fourth proportional to 18,572.40, 27,859.91 and 7,479.14 is: 11,219.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.40 : 27,859.91 = 7,479.14 : x
  2. Step 2: Convert to fraction form
    18,572.40/27,859.91 = 7,479.14/x
  3. Step 3: Cross multiply
    18,572.40x = 27,859.91 × 7,479.14
  4. Step 4: Simplify right side
    18,572.40x = 208,367,990.58
  5. Step 5: Solve for x
    x = 208,367,990.58/18,572.40
  6. Step 6: Final answer
    x = 11,219.23

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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.