Home / 18,760.61-28,120.65-12,191.51

Finding the Fourth Proportional to 18,760.61, 28,120.65 and 12,191.51

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Solution

The fourth proportional to 18,760.61, 28,120.65 and 12,191.51 is: 18,274.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,760.61 : 28,120.65 = 12,191.51 : x
  2. Step 2: Convert to fraction form
    18,760.61/28,120.65 = 12,191.51/x
  3. Step 3: Cross multiply
    18,760.61x = 28,120.65 × 12,191.51
  4. Step 4: Simplify right side
    18,760.61x = 342,833,045.08
  5. Step 5: Solve for x
    x = 342,833,045.08/18,760.61
  6. Step 6: Final answer
    x = 18,274.09

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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.