Home / 39,026.81-53,856.90-21,121.81

Finding the Fourth Proportional to 39,026.81, 53,856.90 and 21,121.81

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Solution

The fourth proportional to 39,026.81, 53,856.90 and 21,121.81 is: 29,148.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,026.81 : 53,856.90 = 21,121.81 : x
  2. Step 2: Convert to fraction form
    39,026.81/53,856.90 = 21,121.81/x
  3. Step 3: Cross multiply
    39,026.81x = 53,856.90 × 21,121.81
  4. Step 4: Simplify right side
    39,026.81x = 1,137,555,377.29
  5. Step 5: Solve for x
    x = 1,137,555,377.29/39,026.81
  6. Step 6: Final answer
    x = 29,148.05

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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.