Home / 19,872.80-27,406.32-15,894.08

Finding the Fourth Proportional to 19,872.80, 27,406.32 and 15,894.08

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Solution

The fourth proportional to 19,872.80, 27,406.32 and 15,894.08 is: 21,919.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.80 : 27,406.32 = 15,894.08 : x
  2. Step 2: Convert to fraction form
    19,872.80/27,406.32 = 15,894.08/x
  3. Step 3: Cross multiply
    19,872.80x = 27,406.32 × 15,894.08
  4. Step 4: Simplify right side
    19,872.80x = 435,598,242.59
  5. Step 5: Solve for x
    x = 435,598,242.59/19,872.80
  6. Step 6: Final answer
    x = 21,919.32

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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.