Home / 18,918.04-28,377.05-10,489.70

Finding the Fourth Proportional to 18,918.04, 28,377.05 and 10,489.70

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Solution

The fourth proportional to 18,918.04, 28,377.05 and 10,489.70 is: 15,734.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.04 : 28,377.05 = 10,489.70 : x
  2. Step 2: Convert to fraction form
    18,918.04/28,377.05 = 10,489.70/x
  3. Step 3: Cross multiply
    18,918.04x = 28,377.05 × 10,489.70
  4. Step 4: Simplify right side
    18,918.04x = 297,666,774.63
  5. Step 5: Solve for x
    x = 297,666,774.63/18,918.04
  6. Step 6: Final answer
    x = 15,734.54

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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.