Home / 7,156.21-9,875.66-3,969.57

Finding the Fourth Proportional to 7,156.21, 9,875.66 and 3,969.57

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Solution

The fourth proportional to 7,156.21, 9,875.66 and 3,969.57 is: 5,478.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,156.21 : 9,875.66 = 3,969.57 : x
  2. Step 2: Convert to fraction form
    7,156.21/9,875.66 = 3,969.57/x
  3. Step 3: Cross multiply
    7,156.21x = 9,875.66 × 3,969.57
  4. Step 4: Simplify right side
    7,156.21x = 39,202,123.67
  5. Step 5: Solve for x
    x = 39,202,123.67/7,156.21
  6. Step 6: Final answer
    x = 5,478.06

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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.