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Finding the Fourth Proportional to 7,159.68, 9,881.64 and 4,175.40

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Solution

The fourth proportional to 7,159.68, 9,881.64 and 4,175.40 is: 5,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,159.68 : 9,881.64 = 4,175.40 : x
  2. Step 2: Convert to fraction form
    7,159.68/9,881.64 = 4,175.40/x
  3. Step 3: Cross multiply
    7,159.68x = 9,881.64 × 4,175.40
  4. Step 4: Simplify right side
    7,159.68x = 41,259,799.66
  5. Step 5: Solve for x
    x = 41,259,799.66/7,159.68
  6. Step 6: Final answer
    x = 5,762.80

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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.