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Finding the Fourth Proportional to 25,929.80, 38,894.70 and 21,993.20

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Solution

The fourth proportional to 25,929.80, 38,894.70 and 21,993.20 is: 32,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,929.80 : 38,894.70 = 21,993.20 : x
  2. Step 2: Convert to fraction form
    25,929.80/38,894.70 = 21,993.20/x
  3. Step 3: Cross multiply
    25,929.80x = 38,894.70 × 21,993.20
  4. Step 4: Simplify right side
    25,929.80x = 855,418,916.04
  5. Step 5: Solve for x
    x = 855,418,916.04/25,929.80
  6. Step 6: Final answer
    x = 32,989.80

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1.5x scale

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.