Home / 15,854.32-21,879.35-8,781.27

Finding the Fourth Proportional to 15,854.32, 21,879.35 and 8,781.27

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Solution

The fourth proportional to 15,854.32, 21,879.35 and 8,781.27 is: 12,118.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,854.32 : 21,879.35 = 8,781.27 : x
  2. Step 2: Convert to fraction form
    15,854.32/21,879.35 = 8,781.27/x
  3. Step 3: Cross multiply
    15,854.32x = 21,879.35 × 8,781.27
  4. Step 4: Simplify right side
    15,854.32x = 192,128,479.77
  5. Step 5: Solve for x
    x = 192,128,479.77/15,854.32
  6. Step 6: Final answer
    x = 12,118.37

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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.