Home / 39,685.04-54,767.34-21,779.89

Finding the Fourth Proportional to 39,685.04, 54,767.34 and 21,779.89

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Solution

The fourth proportional to 39,685.04, 54,767.34 and 21,779.89 is: 30,057.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685.04 : 54,767.34 = 21,779.89 : x
  2. Step 2: Convert to fraction form
    39,685.04/54,767.34 = 21,779.89/x
  3. Step 3: Cross multiply
    39,685.04x = 54,767.34 × 21,779.89
  4. Step 4: Simplify right side
    39,685.04x = 1,192,826,503.87
  5. Step 5: Solve for x
    x = 1,192,826,503.87/39,685.04
  6. Step 6: Final answer
    x = 30,057.33

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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.