Home / 7,278.20-10,902.90-3,985.40

Finding the Fourth Proportional to 7,278.20, 10,902.90 and 3,985.40

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Solution

The fourth proportional to 7,278.20, 10,902.90 and 3,985.40 is: 5,970.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.20 : 10,902.90 = 3,985.40 : x
  2. Step 2: Convert to fraction form
    7,278.20/10,902.90 = 3,985.40/x
  3. Step 3: Cross multiply
    7,278.20x = 10,902.90 × 3,985.40
  4. Step 4: Simplify right side
    7,278.20x = 43,452,417.66
  5. Step 5: Solve for x
    x = 43,452,417.66/7,278.20
  6. Step 6: Final answer
    x = 5,970.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.