Home / 21,378.94-29,503.85-11,947.50

Finding the Fourth Proportional to 21,378.94, 29,503.85 and 11,947.50

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Solution

The fourth proportional to 21,378.94, 29,503.85 and 11,947.50 is: 16,488.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.94 : 29,503.85 = 11,947.50 : x
  2. Step 2: Convert to fraction form
    21,378.94/29,503.85 = 11,947.50/x
  3. Step 3: Cross multiply
    21,378.94x = 29,503.85 × 11,947.50
  4. Step 4: Simplify right side
    21,378.94x = 352,497,188.14
  5. Step 5: Solve for x
    x = 352,497,188.14/21,378.94
  6. Step 6: Final answer
    x = 16,488.06

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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.