Home / 39,690.90-54,774.01-21,785.58

Finding the Fourth Proportional to 39,690.90, 54,774.01 and 21,785.58

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Solution

The fourth proportional to 39,690.90, 54,774.01 and 21,785.58 is: 30,064.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,690.90 : 54,774.01 = 21,785.58 : x
  2. Step 2: Convert to fraction form
    39,690.90/54,774.01 = 21,785.58/x
  3. Step 3: Cross multiply
    39,690.90x = 54,774.01 × 21,785.58
  4. Step 4: Simplify right side
    39,690.90x = 1,193,283,576.78
  5. Step 5: Solve for x
    x = 1,193,283,576.78/39,690.90
  6. Step 6: Final answer
    x = 30,064.41

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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.