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Finding the Fourth Proportional to 7,128.88, 10,678.92 and 5,970.46

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Solution

The fourth proportional to 7,128.88, 10,678.92 and 5,970.46 is: 8,943.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.88 : 10,678.92 = 5,970.46 : x
  2. Step 2: Convert to fraction form
    7,128.88/10,678.92 = 5,970.46/x
  3. Step 3: Cross multiply
    7,128.88x = 10,678.92 × 5,970.46
  4. Step 4: Simplify right side
    7,128.88x = 63,758,064.70
  5. Step 5: Solve for x
    x = 63,758,064.70/7,128.88
  6. Step 6: Final answer
    x = 8,943.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.