Home / 21,015.72-31,514.40-11,152.80

Finding the Fourth Proportional to 21,015.72, 31,514.40 and 11,152.80

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Solution

The fourth proportional to 21,015.72, 31,514.40 and 11,152.80 is: 16,724.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.72 : 31,514.40 = 11,152.80 : x
  2. Step 2: Convert to fraction form
    21,015.72/31,514.40 = 11,152.80/x
  3. Step 3: Cross multiply
    21,015.72x = 31,514.40 × 11,152.80
  4. Step 4: Simplify right side
    21,015.72x = 351,473,800.32
  5. Step 5: Solve for x
    x = 351,473,800.32/21,015.72
  6. Step 6: Final answer
    x = 16,724.33

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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.