Home / 39,868.74-59,778-21,136.95

Finding the Fourth Proportional to 39,868.74, 59,778 and 21,136.95

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Solution

The fourth proportional to 39,868.74, 59,778 and 21,136.95 is: 31,692.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,868.74 : 59,778 = 21,136.95 : x
  2. Step 2: Convert to fraction form
    39,868.74/59,778 = 21,136.95/x
  3. Step 3: Cross multiply
    39,868.74x = 59,778 × 21,136.95
  4. Step 4: Simplify right side
    39,868.74x = 1,263,524,597.10
  5. Step 5: Solve for x
    x = 1,263,524,597.10/39,868.74
  6. Step 6: Final answer
    x = 31,692.11

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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.