Home / 40,920.70-61,381.05-21,205.30

Finding the Fourth Proportional to 40,920.70, 61,381.05 and 21,205.30

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Solution

The fourth proportional to 40,920.70, 61,381.05 and 21,205.30 is: 31,807.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,920.70 : 61,381.05 = 21,205.30 : x
  2. Step 2: Convert to fraction form
    40,920.70/61,381.05 = 21,205.30/x
  3. Step 3: Cross multiply
    40,920.70x = 61,381.05 × 21,205.30
  4. Step 4: Simplify right side
    40,920.70x = 1,301,603,579.57
  5. Step 5: Solve for x
    x = 1,301,603,579.57/40,920.70
  6. Step 6: Final answer
    x = 31,807.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.