Home / 2,139.74-2,951.60-1,551.68

Finding the Fourth Proportional to 2,139.74, 2,951.60 and 1,551.68

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Solution

The fourth proportional to 2,139.74, 2,951.60 and 1,551.68 is: 2,140.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.74 : 2,951.60 = 1,551.68 : x
  2. Step 2: Convert to fraction form
    2,139.74/2,951.60 = 1,551.68/x
  3. Step 3: Cross multiply
    2,139.74x = 2,951.60 × 1,551.68
  4. Step 4: Simplify right side
    2,139.74x = 4,579,938.69
  5. Step 5: Solve for x
    x = 4,579,938.69/2,139.74
  6. Step 6: Final answer
    x = 2,140.42

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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.