Home / 5,167.12-7,130.64-2,809.30

Finding the Fourth Proportional to 5,167.12, 7,130.64 and 2,809.30

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Solution

The fourth proportional to 5,167.12, 7,130.64 and 2,809.30 is: 3,876.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,167.12 : 7,130.64 = 2,809.30 : x
  2. Step 2: Convert to fraction form
    5,167.12/7,130.64 = 2,809.30/x
  3. Step 3: Cross multiply
    5,167.12x = 7,130.64 × 2,809.30
  4. Step 4: Simplify right side
    5,167.12x = 20,032,106.95
  5. Step 5: Solve for x
    x = 20,032,106.95/5,167.12
  6. Step 6: Final answer
    x = 3,876.84

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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.