Home / 20,690.98-28,555.47-12,195.73

Finding the Fourth Proportional to 20,690.98, 28,555.47 and 12,195.73

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Solution

The fourth proportional to 20,690.98, 28,555.47 and 12,195.73 is: 16,831.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.98 : 28,555.47 = 12,195.73 : x
  2. Step 2: Convert to fraction form
    20,690.98/28,555.47 = 12,195.73/x
  3. Step 3: Cross multiply
    20,690.98x = 28,555.47 × 12,195.73
  4. Step 4: Simplify right side
    20,690.98x = 348,254,837.84
  5. Step 5: Solve for x
    x = 348,254,837.84/20,690.98
  6. Step 6: Final answer
    x = 16,831.24

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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.