Home / 2,115.18-2,918.76-1,958.46

Finding the Fourth Proportional to 2,115.18, 2,918.76 and 1,958.46

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Solution

The fourth proportional to 2,115.18, 2,918.76 and 1,958.46 is: 2,702.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.18 : 2,918.76 = 1,958.46 : x
  2. Step 2: Convert to fraction form
    2,115.18/2,918.76 = 1,958.46/x
  3. Step 3: Cross multiply
    2,115.18x = 2,918.76 × 1,958.46
  4. Step 4: Simplify right side
    2,115.18x = 5,716,274.71
  5. Step 5: Solve for x
    x = 5,716,274.71/2,115.18
  6. Step 6: Final answer
    x = 2,702.50

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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.