Home / 2,127.47-2,936.11-1,288.39

Finding the Fourth Proportional to 2,127.47, 2,936.11 and 1,288.39

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Solution

The fourth proportional to 2,127.47, 2,936.11 and 1,288.39 is: 1,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.47 : 2,936.11 = 1,288.39 : x
  2. Step 2: Convert to fraction form
    2,127.47/2,936.11 = 1,288.39/x
  3. Step 3: Cross multiply
    2,127.47x = 2,936.11 × 1,288.39
  4. Step 4: Simplify right side
    2,127.47x = 3,782,854.76
  5. Step 5: Solve for x
    x = 3,782,854.76/2,127.47
  6. Step 6: Final answer
    x = 1,778.10

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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.