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Finding the Fourth Proportional to 7,167.60, 9,881.93 and 5,178.65

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Solution

The fourth proportional to 7,167.60, 9,881.93 and 5,178.65 is: 7,139.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,167.60 : 9,881.93 = 5,178.65 : x
  2. Step 2: Convert to fraction form
    7,167.60/9,881.93 = 5,178.65/x
  3. Step 3: Cross multiply
    7,167.60x = 9,881.93 × 5,178.65
  4. Step 4: Simplify right side
    7,167.60x = 51,174,981.49
  5. Step 5: Solve for x
    x = 51,174,981.49/7,167.60
  6. Step 6: Final answer
    x = 7,139.77

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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.