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Finding the Fourth Proportional to 7,159.68, 9,881.76 and 4,015.68

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Solution

The fourth proportional to 7,159.68, 9,881.76 and 4,015.68 is: 5,542.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,159.68 : 9,881.76 = 4,015.68 : x
  2. Step 2: Convert to fraction form
    7,159.68/9,881.76 = 4,015.68/x
  3. Step 3: Cross multiply
    7,159.68x = 9,881.76 × 4,015.68
  4. Step 4: Simplify right side
    7,159.68x = 39,681,986.00
  5. Step 5: Solve for x
    x = 39,681,986.00/7,159.68
  6. Step 6: Final answer
    x = 5,542.42

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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.