Home / 18,543.75-27,815.63-12,315.93

Finding the Fourth Proportional to 18,543.75, 27,815.63 and 12,315.93

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Solution

The fourth proportional to 18,543.75, 27,815.63 and 12,315.93 is: 18,473.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,543.75 : 27,815.63 = 12,315.93 : x
  2. Step 2: Convert to fraction form
    18,543.75/27,815.63 = 12,315.93/x
  3. Step 3: Cross multiply
    18,543.75x = 27,815.63 × 12,315.93
  4. Step 4: Simplify right side
    18,543.75x = 342,575,351.99
  5. Step 5: Solve for x
    x = 342,575,351.99/18,543.75
  6. Step 6: Final answer
    x = 18,473.90

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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.