Home / 2,121.34-2,927.53-1,281.88

Finding the Fourth Proportional to 2,121.34, 2,927.53 and 1,281.88

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Solution

The fourth proportional to 2,121.34, 2,927.53 and 1,281.88 is: 1,769.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.34 : 2,927.53 = 1,281.88 : x
  2. Step 2: Convert to fraction form
    2,121.34/2,927.53 = 1,281.88/x
  3. Step 3: Cross multiply
    2,121.34x = 2,927.53 × 1,281.88
  4. Step 4: Simplify right side
    2,121.34x = 3,752,742.16
  5. Step 5: Solve for x
    x = 3,752,742.16/2,121.34
  6. Step 6: Final answer
    x = 1,769.04

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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.