Home / 18,818.60-28,227.90-4,779.68

Finding the Fourth Proportional to 18,818.60, 28,227.90 and 4,779.68

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Solution

The fourth proportional to 18,818.60, 28,227.90 and 4,779.68 is: 7,169.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.60 : 28,227.90 = 4,779.68 : x
  2. Step 2: Convert to fraction form
    18,818.60/28,227.90 = 4,779.68/x
  3. Step 3: Cross multiply
    18,818.60x = 28,227.90 × 4,779.68
  4. Step 4: Simplify right side
    18,818.60x = 134,920,205.86
  5. Step 5: Solve for x
    x = 134,920,205.86/18,818.60
  6. Step 6: Final answer
    x = 7,169.52

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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.