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Finding the Fourth Proportional to 7,888.86, 10,876.95 and 6,391.26

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Solution

The fourth proportional to 7,888.86, 10,876.95 and 6,391.26 is: 8,812.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,888.86 : 10,876.95 = 6,391.26 : x
  2. Step 2: Convert to fraction form
    7,888.86/10,876.95 = 6,391.26/x
  3. Step 3: Cross multiply
    7,888.86x = 10,876.95 × 6,391.26
  4. Step 4: Simplify right side
    7,888.86x = 69,517,415.46
  5. Step 5: Solve for x
    x = 69,517,415.46/7,888.86
  6. Step 6: Final answer
    x = 8,812.10

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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.