Home / 42,987.40-64,493.91-20,514.95

Finding the Fourth Proportional to 42,987.40, 64,493.91 and 20,514.95

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Solution

The fourth proportional to 42,987.40, 64,493.91 and 20,514.95 is: 30,778.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,987.40 : 64,493.91 = 20,514.95 : x
  2. Step 2: Convert to fraction form
    42,987.40/64,493.91 = 20,514.95/x
  3. Step 3: Cross multiply
    42,987.40x = 64,493.91 × 20,514.95
  4. Step 4: Simplify right side
    42,987.40x = 1,323,089,338.95
  5. Step 5: Solve for x
    x = 1,323,089,338.95/42,987.40
  6. Step 6: Final answer
    x = 30,778.54

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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.