Home / 15,111.12-20,852.67-8,397.21

Finding the Fourth Proportional to 15,111.12, 20,852.67 and 8,397.21

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Solution

The fourth proportional to 15,111.12, 20,852.67 and 8,397.21 is: 11,587.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.12 : 20,852.67 = 8,397.21 : x
  2. Step 2: Convert to fraction form
    15,111.12/20,852.67 = 8,397.21/x
  3. Step 3: Cross multiply
    15,111.12x = 20,852.67 × 8,397.21
  4. Step 4: Simplify right side
    15,111.12x = 175,104,249.05
  5. Step 5: Solve for x
    x = 175,104,249.05/15,111.12
  6. Step 6: Final answer
    x = 11,587.77

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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.