Home / 21,888.72-30,207.60-12,460.32

Finding the Fourth Proportional to 21,888.72, 30,207.60 and 12,460.32

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Solution

The fourth proportional to 21,888.72, 30,207.60 and 12,460.32 is: 17,195.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.72 : 30,207.60 = 12,460.32 : x
  2. Step 2: Convert to fraction form
    21,888.72/30,207.60 = 12,460.32/x
  3. Step 3: Cross multiply
    21,888.72x = 30,207.60 × 12,460.32
  4. Step 4: Simplify right side
    21,888.72x = 376,396,362.43
  5. Step 5: Solve for x
    x = 376,396,362.43/21,888.72
  6. Step 6: Final answer
    x = 17,195.91

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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.