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Finding the Fourth Proportional to 7,112.43, 9,807.83 and 4,721.54

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Solution

The fourth proportional to 7,112.43, 9,807.83 and 4,721.54 is: 6,510.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.43 : 9,807.83 = 4,721.54 : x
  2. Step 2: Convert to fraction form
    7,112.43/9,807.83 = 4,721.54/x
  3. Step 3: Cross multiply
    7,112.43x = 9,807.83 × 4,721.54
  4. Step 4: Simplify right side
    7,112.43x = 46,307,989.01
  5. Step 5: Solve for x
    x = 46,307,989.01/7,112.43
  6. Step 6: Final answer
    x = 6,510.85

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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.