Home / 2,130.79-2,938.72-2,080.06

Finding the Fourth Proportional to 2,130.79, 2,938.72 and 2,080.06

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Solution

The fourth proportional to 2,130.79, 2,938.72 and 2,080.06 is: 2,868.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.79 : 2,938.72 = 2,080.06 : x
  2. Step 2: Convert to fraction form
    2,130.79/2,938.72 = 2,080.06/x
  3. Step 3: Cross multiply
    2,130.79x = 2,938.72 × 2,080.06
  4. Step 4: Simplify right side
    2,130.79x = 6,112,713.92
  5. Step 5: Solve for x
    x = 6,112,713.92/2,130.79
  6. Step 6: Final answer
    x = 2,868.75

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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.