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Finding the Fourth Proportional to 10,920.20, 15,069.87 and 5,952.20

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Solution

The fourth proportional to 10,920.20, 15,069.87 and 5,952.20 is: 8,214.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.20 : 15,069.87 = 5,952.20 : x
  2. Step 2: Convert to fraction form
    10,920.20/15,069.87 = 5,952.20/x
  3. Step 3: Cross multiply
    10,920.20x = 15,069.87 × 5,952.20
  4. Step 4: Simplify right side
    10,920.20x = 89,698,804.86
  5. Step 5: Solve for x
    x = 89,698,804.86/10,920.20
  6. Step 6: Final answer
    x = 8,214.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.