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Finding the Fourth Proportional to 7,953.68, 10,939.56 and 6,378.32

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Solution

The fourth proportional to 7,953.68, 10,939.56 and 6,378.32 is: 8,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,953.68 : 10,939.56 = 6,378.32 : x
  2. Step 2: Convert to fraction form
    7,953.68/10,939.56 = 6,378.32/x
  3. Step 3: Cross multiply
    7,953.68x = 10,939.56 × 6,378.32
  4. Step 4: Simplify right side
    7,953.68x = 69,776,014.34
  5. Step 5: Solve for x
    x = 69,776,014.34/7,953.68
  6. Step 6: Final answer
    x = 8,772.80

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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.