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Finding the Fourth Proportional to 10,781.87, 14,877.95 and 7,950.79

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Solution

The fourth proportional to 10,781.87, 14,877.95 and 7,950.79 is: 10,971.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,781.87 : 14,877.95 = 7,950.79 : x
  2. Step 2: Convert to fraction form
    10,781.87/14,877.95 = 7,950.79/x
  3. Step 3: Cross multiply
    10,781.87x = 14,877.95 × 7,950.79
  4. Step 4: Simplify right side
    10,781.87x = 118,291,438.76
  5. Step 5: Solve for x
    x = 118,291,438.76/10,781.87
  6. Step 6: Final answer
    x = 10,971.33

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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.