Home / 2,126.47-2,934.73-1,287.39

Finding the Fourth Proportional to 2,126.47, 2,934.73 and 1,287.39

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Solution

The fourth proportional to 2,126.47, 2,934.73 and 1,287.39 is: 1,776.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.47 : 2,934.73 = 1,287.39 : x
  2. Step 2: Convert to fraction form
    2,126.47/2,934.73 = 1,287.39/x
  3. Step 3: Cross multiply
    2,126.47x = 2,934.73 × 1,287.39
  4. Step 4: Simplify right side
    2,126.47x = 3,778,130.60
  5. Step 5: Solve for x
    x = 3,778,130.60/2,126.47
  6. Step 6: Final answer
    x = 1,776.71

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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.