Home / 5,278.80-7,860.72-5,220.57

Finding the Fourth Proportional to 5,278.80, 7,860.72 and 5,220.57

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Solution

The fourth proportional to 5,278.80, 7,860.72 and 5,220.57 is: 7,774.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.80 : 7,860.72 = 5,220.57 : x
  2. Step 2: Convert to fraction form
    5,278.80/7,860.72 = 5,220.57/x
  3. Step 3: Cross multiply
    5,278.80x = 7,860.72 × 5,220.57
  4. Step 4: Simplify right side
    5,278.80x = 41,037,439.01
  5. Step 5: Solve for x
    x = 41,037,439.01/5,278.80
  6. Step 6: Final answer
    x = 7,774.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.