Home / 7,147.05-9,862.20-4,122.51

Finding the Fourth Proportional to 7,147.05, 9,862.20 and 4,122.51

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Solution

The fourth proportional to 7,147.05, 9,862.20 and 4,122.51 is: 5,688.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,147.05 : 9,862.20 = 4,122.51 : x
  2. Step 2: Convert to fraction form
    7,147.05/9,862.20 = 4,122.51/x
  3. Step 3: Cross multiply
    7,147.05x = 9,862.20 × 4,122.51
  4. Step 4: Simplify right side
    7,147.05x = 40,657,018.12
  5. Step 5: Solve for x
    x = 40,657,018.12/7,147.05
  6. Step 6: Final answer
    x = 5,688.64

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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.