Home / 42,986.90-64,493.16-20,514.45

Finding the Fourth Proportional to 42,986.90, 64,493.16 and 20,514.45

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Solution

The fourth proportional to 42,986.90, 64,493.16 and 20,514.45 is: 30,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,986.90 : 64,493.16 = 20,514.45 : x
  2. Step 2: Convert to fraction form
    42,986.90/64,493.16 = 20,514.45/x
  3. Step 3: Cross multiply
    42,986.90x = 64,493.16 × 20,514.45
  4. Step 4: Simplify right side
    42,986.90x = 1,323,041,544.93
  5. Step 5: Solve for x
    x = 1,323,041,544.93/42,986.90
  6. Step 6: Final answer
    x = 30,777.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.