Home / 19,621.86-27,088.20-15,135.54

Finding the Fourth Proportional to 19,621.86, 27,088.20 and 15,135.54

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Solution

The fourth proportional to 19,621.86, 27,088.20 and 15,135.54 is: 20,894.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,621.86 : 27,088.20 = 15,135.54 : x
  2. Step 2: Convert to fraction form
    19,621.86/27,088.20 = 15,135.54/x
  3. Step 3: Cross multiply
    19,621.86x = 27,088.20 × 15,135.54
  4. Step 4: Simplify right side
    19,621.86x = 409,994,534.63
  5. Step 5: Solve for x
    x = 409,994,534.63/19,621.86
  6. Step 6: Final answer
    x = 20,894.78

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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.