Home / 5,130.90-7,080.57-2,892.78

Finding the Fourth Proportional to 5,130.90, 7,080.57 and 2,892.78

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Solution

The fourth proportional to 5,130.90, 7,080.57 and 2,892.78 is: 3,992.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.90 : 7,080.57 = 2,892.78 : x
  2. Step 2: Convert to fraction form
    5,130.90/7,080.57 = 2,892.78/x
  3. Step 3: Cross multiply
    5,130.90x = 7,080.57 × 2,892.78
  4. Step 4: Simplify right side
    5,130.90x = 20,482,531.28
  5. Step 5: Solve for x
    x = 20,482,531.28/5,130.90
  6. Step 6: Final answer
    x = 3,992.00

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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.