Home / 39,684.18-54,764.00-21,779.48

Finding the Fourth Proportional to 39,684.18, 54,764.00 and 21,779.48

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Solution

The fourth proportional to 39,684.18, 54,764.00 and 21,779.48 is: 30,055.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,684.18 : 54,764.00 = 21,779.48 : x
  2. Step 2: Convert to fraction form
    39,684.18/54,764.00 = 21,779.48/x
  3. Step 3: Cross multiply
    39,684.18x = 54,764.00 × 21,779.48
  4. Step 4: Simplify right side
    39,684.18x = 1,192,731,552.41
  5. Step 5: Solve for x
    x = 1,192,731,552.41/39,684.18
  6. Step 6: Final answer
    x = 30,055.59

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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.