Home / 18,750.89-28,140.18-8,890.21

Finding the Fourth Proportional to 18,750.89, 28,140.18 and 8,890.21

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Solution

The fourth proportional to 18,750.89, 28,140.18 and 8,890.21 is: 13,341.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.89 : 28,140.18 = 8,890.21 : x
  2. Step 2: Convert to fraction form
    18,750.89/28,140.18 = 8,890.21/x
  3. Step 3: Cross multiply
    18,750.89x = 28,140.18 × 8,890.21
  4. Step 4: Simplify right side
    18,750.89x = 250,172,039.29
  5. Step 5: Solve for x
    x = 250,172,039.29/18,750.89
  6. Step 6: Final answer
    x = 13,341.87

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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.