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Finding the Fourth Proportional to 7,876.86, 10,860.21 and 5,039.58

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Solution

The fourth proportional to 7,876.86, 10,860.21 and 5,039.58 is: 6,948.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.86 : 10,860.21 = 5,039.58 : x
  2. Step 2: Convert to fraction form
    7,876.86/10,860.21 = 5,039.58/x
  3. Step 3: Cross multiply
    7,876.86x = 10,860.21 × 5,039.58
  4. Step 4: Simplify right side
    7,876.86x = 54,730,897.11
  5. Step 5: Solve for x
    x = 54,730,897.11/7,876.86
  6. Step 6: Final answer
    x = 6,948.31

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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.