Home / 20,787.63-28,686.87-11,356.26

Finding the Fourth Proportional to 20,787.63, 28,686.87 and 11,356.26

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Solution

The fourth proportional to 20,787.63, 28,686.87 and 11,356.26 is: 15,671.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.63 : 28,686.87 = 11,356.26 : x
  2. Step 2: Convert to fraction form
    20,787.63/28,686.87 = 11,356.26/x
  3. Step 3: Cross multiply
    20,787.63x = 28,686.87 × 11,356.26
  4. Step 4: Simplify right side
    20,787.63x = 325,775,489.32
  5. Step 5: Solve for x
    x = 325,775,489.32/20,787.63
  6. Step 6: Final answer
    x = 15,671.61

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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.