Home / 18,918.55-28,381.92-5,770.57

Finding the Fourth Proportional to 18,918.55, 28,381.92 and 5,770.57

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Solution

The fourth proportional to 18,918.55, 28,381.92 and 5,770.57 is: 8,657.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.55 : 28,381.92 = 5,770.57 : x
  2. Step 2: Convert to fraction form
    18,918.55/28,381.92 = 5,770.57/x
  3. Step 3: Cross multiply
    18,918.55x = 28,381.92 × 5,770.57
  4. Step 4: Simplify right side
    18,918.55x = 163,779,856.09
  5. Step 5: Solve for x
    x = 163,779,856.09/18,918.55
  6. Step 6: Final answer
    x = 8,657.10

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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.