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Finding the Fourth Proportional to 7,109.47, 9,811.20 and 4,126.96

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Solution

The fourth proportional to 7,109.47, 9,811.20 and 4,126.96 is: 5,695.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,109.47 : 9,811.20 = 4,126.96 : x
  2. Step 2: Convert to fraction form
    7,109.47/9,811.20 = 4,126.96/x
  3. Step 3: Cross multiply
    7,109.47x = 9,811.20 × 4,126.96
  4. Step 4: Simplify right side
    7,109.47x = 40,490,429.95
  5. Step 5: Solve for x
    x = 40,490,429.95/7,109.47
  6. Step 6: Final answer
    x = 5,695.28

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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.