Home / 30,570.15-42,168.89-19,221.66

Finding the Fourth Proportional to 30,570.15, 42,168.89 and 19,221.66

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Solution

The fourth proportional to 30,570.15, 42,168.89 and 19,221.66 is: 26,514.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,570.15 : 42,168.89 = 19,221.66 : x
  2. Step 2: Convert to fraction form
    30,570.15/42,168.89 = 19,221.66/x
  3. Step 3: Cross multiply
    30,570.15x = 42,168.89 × 19,221.66
  4. Step 4: Simplify right side
    30,570.15x = 810,556,066.16
  5. Step 5: Solve for x
    x = 810,556,066.16/30,570.15
  6. Step 6: Final answer
    x = 26,514.63

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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.