Home / 18,869.90-28,279.29-7,176.74

Finding the Fourth Proportional to 18,869.90, 28,279.29 and 7,176.74

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Solution

The fourth proportional to 18,869.90, 28,279.29 and 7,176.74 is: 10,755.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.90 : 28,279.29 = 7,176.74 : x
  2. Step 2: Convert to fraction form
    18,869.90/28,279.29 = 7,176.74/x
  3. Step 3: Cross multiply
    18,869.90x = 28,279.29 × 7,176.74
  4. Step 4: Simplify right side
    18,869.90x = 202,952,970.32
  5. Step 5: Solve for x
    x = 202,952,970.32/18,869.90
  6. Step 6: Final answer
    x = 10,755.38

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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.