Home / 21,052.48-31,578.72-8,572.72

Finding the Fourth Proportional to 21,052.48, 31,578.72 and 8,572.72

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Solution

The fourth proportional to 21,052.48, 31,578.72 and 8,572.72 is: 12,859.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.48 : 31,578.72 = 8,572.72 : x
  2. Step 2: Convert to fraction form
    21,052.48/31,578.72 = 8,572.72/x
  3. Step 3: Cross multiply
    21,052.48x = 31,578.72 × 8,572.72
  4. Step 4: Simplify right side
    21,052.48x = 270,715,524.52
  5. Step 5: Solve for x
    x = 270,715,524.52/21,052.48
  6. Step 6: Final answer
    x = 12,859.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.