Home / 7,156.05-9,875.85-3,969.51

Finding the Fourth Proportional to 7,156.05, 9,875.85 and 3,969.51

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Solution

The fourth proportional to 7,156.05, 9,875.85 and 3,969.51 is: 5,478.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,156.05 : 9,875.85 = 3,969.51 : x
  2. Step 2: Convert to fraction form
    7,156.05/9,875.85 = 3,969.51/x
  3. Step 3: Cross multiply
    7,156.05x = 9,875.85 × 3,969.51
  4. Step 4: Simplify right side
    7,156.05x = 39,202,285.33
  5. Step 5: Solve for x
    x = 39,202,285.33/7,156.05
  6. Step 6: Final answer
    x = 5,478.20

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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.