Home / 2,124.20-2,931.90-1,338.14

Finding the Fourth Proportional to 2,124.20, 2,931.90 and 1,338.14

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Solution

The fourth proportional to 2,124.20, 2,931.90 and 1,338.14 is: 1,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.20 : 2,931.90 = 1,338.14 : x
  2. Step 2: Convert to fraction form
    2,124.20/2,931.90 = 1,338.14/x
  3. Step 3: Cross multiply
    2,124.20x = 2,931.90 × 1,338.14
  4. Step 4: Simplify right side
    2,124.20x = 3,923,292.67
  5. Step 5: Solve for x
    x = 3,923,292.67/2,124.20
  6. Step 6: Final answer
    x = 1,846.95

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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.