Home / 21,991.63-30,352.52-12,560.20

Finding the Fourth Proportional to 21,991.63, 30,352.52 and 12,560.20

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Solution

The fourth proportional to 21,991.63, 30,352.52 and 12,560.20 is: 17,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.63 : 30,352.52 = 12,560.20 : x
  2. Step 2: Convert to fraction form
    21,991.63/30,352.52 = 12,560.20/x
  3. Step 3: Cross multiply
    21,991.63x = 30,352.52 × 12,560.20
  4. Step 4: Simplify right side
    21,991.63x = 381,233,721.70
  5. Step 5: Solve for x
    x = 381,233,721.70/21,991.63
  6. Step 6: Final answer
    x = 17,335.40

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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.