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Finding the Fourth Proportional to 18,525, 27,779.10 and 7,990.04

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Solution

The fourth proportional to 18,525, 27,779.10 and 7,990.04 is: 11,981.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,525 : 27,779.10 = 7,990.04 : x
  2. Step 2: Convert to fraction form
    18,525/27,779.10 = 7,990.04/x
  3. Step 3: Cross multiply
    18,525x = 27,779.10 × 7,990.04
  4. Step 4: Simplify right side
    18,525x = 221,956,120.16
  5. Step 5: Solve for x
    x = 221,956,120.16/18,525
  6. Step 6: Final answer
    x = 11,981.44

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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.