Home / 3,701.64-5,108.88-2,129.40

Finding the Fourth Proportional to 3,701.64, 5,108.88 and 2,129.40

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Solution

The fourth proportional to 3,701.64, 5,108.88 and 2,129.40 is: 2,938.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,701.64 : 5,108.88 = 2,129.40 : x
  2. Step 2: Convert to fraction form
    3,701.64/5,108.88 = 2,129.40/x
  3. Step 3: Cross multiply
    3,701.64x = 5,108.88 × 2,129.40
  4. Step 4: Simplify right side
    3,701.64x = 10,878,849.07
  5. Step 5: Solve for x
    x = 10,878,849.07/3,701.64
  6. Step 6: Final answer
    x = 2,938.93

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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.