Home / 28,139.43-38,787.75-22,161.63

Finding the Fourth Proportional to 28,139.43, 38,787.75 and 22,161.63

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Solution

The fourth proportional to 28,139.43, 38,787.75 and 22,161.63 is: 30,547.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.43 : 38,787.75 = 22,161.63 : x
  2. Step 2: Convert to fraction form
    28,139.43/38,787.75 = 22,161.63/x
  3. Step 3: Cross multiply
    28,139.43x = 38,787.75 × 22,161.63
  4. Step 4: Simplify right side
    28,139.43x = 859,599,764.03
  5. Step 5: Solve for x
    x = 859,599,764.03/28,139.43
  6. Step 6: Final answer
    x = 30,547.87

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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.