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Finding the Fourth Proportional to 18,809.96, 25,948.55 and 15,824.70

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Solution

The fourth proportional to 18,809.96, 25,948.55 and 15,824.70 is: 21,830.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.96 : 25,948.55 = 15,824.70 : x
  2. Step 2: Convert to fraction form
    18,809.96/25,948.55 = 15,824.70/x
  3. Step 3: Cross multiply
    18,809.96x = 25,948.55 × 15,824.70
  4. Step 4: Simplify right side
    18,809.96x = 410,628,058.75
  5. Step 5: Solve for x
    x = 410,628,058.75/18,809.96
  6. Step 6: Final answer
    x = 21,830.36

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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.