Home / 2,101.45-2,900.13-1,392.06

Finding the Fourth Proportional to 2,101.45, 2,900.13 and 1,392.06

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Solution

The fourth proportional to 2,101.45, 2,900.13 and 1,392.06 is: 1,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.45 : 2,900.13 = 1,392.06 : x
  2. Step 2: Convert to fraction form
    2,101.45/2,900.13 = 1,392.06/x
  3. Step 3: Cross multiply
    2,101.45x = 2,900.13 × 1,392.06
  4. Step 4: Simplify right side
    2,101.45x = 4,037,154.97
  5. Step 5: Solve for x
    x = 4,037,154.97/2,101.45
  6. Step 6: Final answer
    x = 1,921.13

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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.