Home / 7,127.89-9,838.05-4,145.43

Finding the Fourth Proportional to 7,127.89, 9,838.05 and 4,145.43

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Solution

The fourth proportional to 7,127.89, 9,838.05 and 4,145.43 is: 5,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,127.89 : 9,838.05 = 4,145.43 : x
  2. Step 2: Convert to fraction form
    7,127.89/9,838.05 = 4,145.43/x
  3. Step 3: Cross multiply
    7,127.89x = 9,838.05 × 4,145.43
  4. Step 4: Simplify right side
    7,127.89x = 40,782,947.61
  5. Step 5: Solve for x
    x = 40,782,947.61/7,127.89
  6. Step 6: Final answer
    x = 5,721.60

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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.