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Finding the Fourth Proportional to 7,055.86, 9,737.28 and 3,989.47

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Solution

The fourth proportional to 7,055.86, 9,737.28 and 3,989.47 is: 5,505.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,055.86 : 9,737.28 = 3,989.47 : x
  2. Step 2: Convert to fraction form
    7,055.86/9,737.28 = 3,989.47/x
  3. Step 3: Cross multiply
    7,055.86x = 9,737.28 × 3,989.47
  4. Step 4: Simplify right side
    7,055.86x = 38,846,586.44
  5. Step 5: Solve for x
    x = 38,846,586.44/7,055.86
  6. Step 6: Final answer
    x = 5,505.58

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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.