Home / 2,129.40-2,941.65-2,112.93

Finding the Fourth Proportional to 2,129.40, 2,941.65 and 2,112.93

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Solution

The fourth proportional to 2,129.40, 2,941.65 and 2,112.93 is: 2,918.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.40 : 2,941.65 = 2,112.93 : x
  2. Step 2: Convert to fraction form
    2,129.40/2,941.65 = 2,112.93/x
  3. Step 3: Cross multiply
    2,129.40x = 2,941.65 × 2,112.93
  4. Step 4: Simplify right side
    2,129.40x = 6,215,500.53
  5. Step 5: Solve for x
    x = 6,215,500.53/2,129.40
  6. Step 6: Final answer
    x = 2,918.90

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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.