Home / 19,906.86-27,482.04-15,420.54

Finding the Fourth Proportional to 19,906.86, 27,482.04 and 15,420.54

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Solution

The fourth proportional to 19,906.86, 27,482.04 and 15,420.54 is: 21,288.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,906.86 : 27,482.04 = 15,420.54 : x
  2. Step 2: Convert to fraction form
    19,906.86/27,482.04 = 15,420.54/x
  3. Step 3: Cross multiply
    19,906.86x = 27,482.04 × 15,420.54
  4. Step 4: Simplify right side
    19,906.86x = 423,787,897.10
  5. Step 5: Solve for x
    x = 423,787,897.10/19,906.86
  6. Step 6: Final answer
    x = 21,288.54

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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.