Home / 2,123.90-2,930.25-1,326.68

Finding the Fourth Proportional to 2,123.90, 2,930.25 and 1,326.68

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Solution

The fourth proportional to 2,123.90, 2,930.25 and 1,326.68 is: 1,830.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.90 : 2,930.25 = 1,326.68 : x
  2. Step 2: Convert to fraction form
    2,123.90/2,930.25 = 1,326.68/x
  3. Step 3: Cross multiply
    2,123.90x = 2,930.25 × 1,326.68
  4. Step 4: Simplify right side
    2,123.90x = 3,887,503.66
  5. Step 5: Solve for x
    x = 3,887,503.66/2,123.90
  6. Step 6: Final answer
    x = 1,830.36

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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.