Home / 18,675.60-28,014.20-8,689.72

Finding the Fourth Proportional to 18,675.60, 28,014.20 and 8,689.72

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Solution

The fourth proportional to 18,675.60, 28,014.20 and 8,689.72 is: 13,034.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,675.60 : 28,014.20 = 8,689.72 : x
  2. Step 2: Convert to fraction form
    18,675.60/28,014.20 = 8,689.72/x
  3. Step 3: Cross multiply
    18,675.60x = 28,014.20 × 8,689.72
  4. Step 4: Simplify right side
    18,675.60x = 243,435,554.02
  5. Step 5: Solve for x
    x = 243,435,554.02/18,675.60
  6. Step 6: Final answer
    x = 13,034.95

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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.