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Finding the Fourth Proportional to 7,564.80, 11,341.80 and 4,278.90

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Solution

The fourth proportional to 7,564.80, 11,341.80 and 4,278.90 is: 6,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,564.80 : 11,341.80 = 4,278.90 : x
  2. Step 2: Convert to fraction form
    7,564.80/11,341.80 = 4,278.90/x
  3. Step 3: Cross multiply
    7,564.80x = 11,341.80 × 4,278.90
  4. Step 4: Simplify right side
    7,564.80x = 48,530,428.02
  5. Step 5: Solve for x
    x = 48,530,428.02/7,564.80
  6. Step 6: Final answer
    x = 6,415.30

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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.