Home / 15,645.27-21,590.49-8,475.21

Finding the Fourth Proportional to 15,645.27, 21,590.49 and 8,475.21

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Solution

The fourth proportional to 15,645.27, 21,590.49 and 8,475.21 is: 11,695.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,645.27 : 21,590.49 = 8,475.21 : x
  2. Step 2: Convert to fraction form
    15,645.27/21,590.49 = 8,475.21/x
  3. Step 3: Cross multiply
    15,645.27x = 21,590.49 × 8,475.21
  4. Step 4: Simplify right side
    15,645.27x = 182,983,936.75
  5. Step 5: Solve for x
    x = 182,983,936.75/15,645.27
  6. Step 6: Final answer
    x = 11,695.80

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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.