Home / 3,689.52-5,090.40-2,117.04

Finding the Fourth Proportional to 3,689.52, 5,090.40 and 2,117.04

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Solution

The fourth proportional to 3,689.52, 5,090.40 and 2,117.04 is: 2,920.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.52 : 5,090.40 = 2,117.04 : x
  2. Step 2: Convert to fraction form
    3,689.52/5,090.40 = 2,117.04/x
  3. Step 3: Cross multiply
    3,689.52x = 5,090.40 × 2,117.04
  4. Step 4: Simplify right side
    3,689.52x = 10,776,580.42
  5. Step 5: Solve for x
    x = 10,776,580.42/3,689.52
  6. Step 6: Final answer
    x = 2,920.86

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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.