Home / 28,672.38-39,521.49-21,392.10

Finding the Fourth Proportional to 28,672.38, 39,521.49 and 21,392.10

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Solution

The fourth proportional to 28,672.38, 39,521.49 and 21,392.10 is: 29,486.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.38 : 39,521.49 = 21,392.10 : x
  2. Step 2: Convert to fraction form
    28,672.38/39,521.49 = 21,392.10/x
  3. Step 3: Cross multiply
    28,672.38x = 39,521.49 × 21,392.10
  4. Step 4: Simplify right side
    28,672.38x = 845,447,666.23
  5. Step 5: Solve for x
    x = 845,447,666.23/28,672.38
  6. Step 6: Final answer
    x = 29,486.48

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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.