Home / 39,723.40-54,818.12-21,818.35

Finding the Fourth Proportional to 39,723.40, 54,818.12 and 21,818.35

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Solution

The fourth proportional to 39,723.40, 54,818.12 and 21,818.35 is: 30,109.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,723.40 : 54,818.12 = 21,818.35 : x
  2. Step 2: Convert to fraction form
    39,723.40/54,818.12 = 21,818.35/x
  3. Step 3: Cross multiply
    39,723.40x = 54,818.12 × 21,818.35
  4. Step 4: Simplify right side
    39,723.40x = 1,196,040,928.50
  5. Step 5: Solve for x
    x = 1,196,040,928.50/39,723.40
  6. Step 6: Final answer
    x = 30,109.23

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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.