Home / 28,209.20-42,308.40-8,488.40

Finding the Fourth Proportional to 28,209.20, 42,308.40 and 8,488.40

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Solution

The fourth proportional to 28,209.20, 42,308.40 and 8,488.40 is: 12,730.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.20 : 42,308.40 = 8,488.40 : x
  2. Step 2: Convert to fraction form
    28,209.20/42,308.40 = 8,488.40/x
  3. Step 3: Cross multiply
    28,209.20x = 42,308.40 × 8,488.40
  4. Step 4: Simplify right side
    28,209.20x = 359,130,622.56
  5. Step 5: Solve for x
    x = 359,130,622.56/28,209.20
  6. Step 6: Final answer
    x = 12,730.98

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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.