Home / 20,788.19-28,686.36-11,356.75

Finding the Fourth Proportional to 20,788.19, 28,686.36 and 11,356.75

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Solution

The fourth proportional to 20,788.19, 28,686.36 and 11,356.75 is: 15,671.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.19 : 28,686.36 = 11,356.75 : x
  2. Step 2: Convert to fraction form
    20,788.19/28,686.36 = 11,356.75/x
  3. Step 3: Cross multiply
    20,788.19x = 28,686.36 × 11,356.75
  4. Step 4: Simplify right side
    20,788.19x = 325,783,818.93
  5. Step 5: Solve for x
    x = 325,783,818.93/20,788.19
  6. Step 6: Final answer
    x = 15,671.58

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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.