Home / 18,750.19-28,139.10-8,889.43

Finding the Fourth Proportional to 18,750.19, 28,139.10 and 8,889.43

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Solution

The fourth proportional to 18,750.19, 28,139.10 and 8,889.43 is: 13,340.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.19 : 28,139.10 = 8,889.43 : x
  2. Step 2: Convert to fraction form
    18,750.19/28,139.10 = 8,889.43/x
  3. Step 3: Cross multiply
    18,750.19x = 28,139.10 × 8,889.43
  4. Step 4: Simplify right side
    18,750.19x = 250,140,559.71
  5. Step 5: Solve for x
    x = 250,140,559.71/18,750.19
  6. Step 6: Final answer
    x = 13,340.69

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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.