Home / 7,156.96-9,876.41-3,970.25

Finding the Fourth Proportional to 7,156.96, 9,876.41 and 3,970.25

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Solution

The fourth proportional to 7,156.96, 9,876.41 and 3,970.25 is: 5,478.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,156.96 : 9,876.41 = 3,970.25 : x
  2. Step 2: Convert to fraction form
    7,156.96/9,876.41 = 3,970.25/x
  3. Step 3: Cross multiply
    7,156.96x = 9,876.41 × 3,970.25
  4. Step 4: Simplify right side
    7,156.96x = 39,211,799.49
  5. Step 5: Solve for x
    x = 39,211,799.49/7,156.96
  6. Step 6: Final answer
    x = 5,478.84

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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.