Home / 2,127.14-2,934.90-1,287.71

Finding the Fourth Proportional to 2,127.14, 2,934.90 and 1,287.71

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Solution

The fourth proportional to 2,127.14, 2,934.90 and 1,287.71 is: 1,776.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.14 : 2,934.90 = 1,287.71 : x
  2. Step 2: Convert to fraction form
    2,127.14/2,934.90 = 1,287.71/x
  3. Step 3: Cross multiply
    2,127.14x = 2,934.90 × 1,287.71
  4. Step 4: Simplify right side
    2,127.14x = 3,779,285.40
  5. Step 5: Solve for x
    x = 3,779,285.40/2,127.14
  6. Step 6: Final answer
    x = 1,776.70

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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.