Home / 28,818.52-39,724.11-21,638.07

Finding the Fourth Proportional to 28,818.52, 39,724.11 and 21,638.07

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Solution

The fourth proportional to 28,818.52, 39,724.11 and 21,638.07 is: 29,826.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,818.52 : 39,724.11 = 21,638.07 : x
  2. Step 2: Convert to fraction form
    28,818.52/39,724.11 = 21,638.07/x
  3. Step 3: Cross multiply
    28,818.52x = 39,724.11 × 21,638.07
  4. Step 4: Simplify right side
    28,818.52x = 859,553,072.87
  5. Step 5: Solve for x
    x = 859,553,072.87/28,818.52
  6. Step 6: Final answer
    x = 29,826.41

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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.