Home / 3,390.12-4,666.14-2,891.16

Finding the Fourth Proportional to 3,390.12, 4,666.14 and 2,891.16

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Solution

The fourth proportional to 3,390.12, 4,666.14 and 2,891.16 is: 3,979.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.12 : 4,666.14 = 2,891.16 : x
  2. Step 2: Convert to fraction form
    3,390.12/4,666.14 = 2,891.16/x
  3. Step 3: Cross multiply
    3,390.12x = 4,666.14 × 2,891.16
  4. Step 4: Simplify right side
    3,390.12x = 13,490,557.32
  5. Step 5: Solve for x
    x = 13,490,557.32/3,390.12
  6. Step 6: Final answer
    x = 3,979.37

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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.