Home / 21,400.20-32,260.68-19,972.98

Finding the Fourth Proportional to 21,400.20, 32,260.68 and 19,972.98

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Solution

The fourth proportional to 21,400.20, 32,260.68 and 19,972.98 is: 30,109.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.20 : 32,260.68 = 19,972.98 : x
  2. Step 2: Convert to fraction form
    21,400.20/32,260.68 = 19,972.98/x
  3. Step 3: Cross multiply
    21,400.20x = 32,260.68 × 19,972.98
  4. Step 4: Simplify right side
    21,400.20x = 644,341,916.43
  5. Step 5: Solve for x
    x = 644,341,916.43/21,400.20
  6. Step 6: Final answer
    x = 30,109.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.