Home / 20,351.12-28,085.56-12,392.06

Finding the Fourth Proportional to 20,351.12, 28,085.56 and 12,392.06

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Solution

The fourth proportional to 20,351.12, 28,085.56 and 12,392.06 is: 17,101.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.12 : 28,085.56 = 12,392.06 : x
  2. Step 2: Convert to fraction form
    20,351.12/28,085.56 = 12,392.06/x
  3. Step 3: Cross multiply
    20,351.12x = 28,085.56 × 12,392.06
  4. Step 4: Simplify right side
    20,351.12x = 348,037,944.65
  5. Step 5: Solve for x
    x = 348,037,944.65/20,351.12
  6. Step 6: Final answer
    x = 17,101.66

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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.