Home / 39,761.72-54,870.52-21,856.34

Finding the Fourth Proportional to 39,761.72, 54,870.52 and 21,856.34

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Solution

The fourth proportional to 39,761.72, 54,870.52 and 21,856.34 is: 30,161.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,761.72 : 54,870.52 = 21,856.34 : x
  2. Step 2: Convert to fraction form
    39,761.72/54,870.52 = 21,856.34/x
  3. Step 3: Cross multiply
    39,761.72x = 54,870.52 × 21,856.34
  4. Step 4: Simplify right side
    39,761.72x = 1,199,268,741.10
  5. Step 5: Solve for x
    x = 1,199,268,741.10/39,761.72
  6. Step 6: Final answer
    x = 30,161.39

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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.