Home / 2,143.72-2,957.70-1,247.08

Finding the Fourth Proportional to 2,143.72, 2,957.70 and 1,247.08

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Solution

The fourth proportional to 2,143.72, 2,957.70 and 1,247.08 is: 1,720.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.72 : 2,957.70 = 1,247.08 : x
  2. Step 2: Convert to fraction form
    2,143.72/2,957.70 = 1,247.08/x
  3. Step 3: Cross multiply
    2,143.72x = 2,957.70 × 1,247.08
  4. Step 4: Simplify right side
    2,143.72x = 3,688,488.52
  5. Step 5: Solve for x
    x = 3,688,488.52/2,143.72
  6. Step 6: Final answer
    x = 1,720.60

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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.