Home / 21,972.35-30,323.23-13,017.95

Finding the Fourth Proportional to 21,972.35, 30,323.23 and 13,017.95

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Solution

The fourth proportional to 21,972.35, 30,323.23 and 13,017.95 is: 17,965.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.35 : 30,323.23 = 13,017.95 : x
  2. Step 2: Convert to fraction form
    21,972.35/30,323.23 = 13,017.95/x
  3. Step 3: Cross multiply
    21,972.35x = 30,323.23 × 13,017.95
  4. Step 4: Simplify right side
    21,972.35x = 394,746,291.98
  5. Step 5: Solve for x
    x = 394,746,291.98/21,972.35
  6. Step 6: Final answer
    x = 17,965.59

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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.