Home / 7,884.80-10,875.56-6,392.78

Finding the Fourth Proportional to 7,884.80, 10,875.56 and 6,392.78

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Solution

The fourth proportional to 7,884.80, 10,875.56 and 6,392.78 is: 8,817.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,884.80 : 10,875.56 = 6,392.78 : x
  2. Step 2: Convert to fraction form
    7,884.80/10,875.56 = 6,392.78/x
  3. Step 3: Cross multiply
    7,884.80x = 10,875.56 × 6,392.78
  4. Step 4: Simplify right side
    7,884.80x = 69,525,062.46
  5. Step 5: Solve for x
    x = 69,525,062.46/7,884.80
  6. Step 6: Final answer
    x = 8,817.61

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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.