Home / 3,931.95-5,426.02-2,139.45

Finding the Fourth Proportional to 3,931.95, 5,426.02 and 2,139.45

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Solution

The fourth proportional to 3,931.95, 5,426.02 and 2,139.45 is: 2,952.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.95 : 5,426.02 = 2,139.45 : x
  2. Step 2: Convert to fraction form
    3,931.95/5,426.02 = 2,139.45/x
  3. Step 3: Cross multiply
    3,931.95x = 5,426.02 × 2,139.45
  4. Step 4: Simplify right side
    3,931.95x = 11,608,698.49
  5. Step 5: Solve for x
    x = 11,608,698.49/3,931.95
  6. Step 6: Final answer
    x = 2,952.40

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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.