Home / 28,787.40-43,108.20-21,351.60

Finding the Fourth Proportional to 28,787.40, 43,108.20 and 21,351.60

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Solution

The fourth proportional to 28,787.40, 43,108.20 and 21,351.60 is: 31,973.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,787.40 : 43,108.20 = 21,351.60 : x
  2. Step 2: Convert to fraction form
    28,787.40/43,108.20 = 21,351.60/x
  3. Step 3: Cross multiply
    28,787.40x = 43,108.20 × 21,351.60
  4. Step 4: Simplify right side
    28,787.40x = 920,429,043.12
  5. Step 5: Solve for x
    x = 920,429,043.12/28,787.40
  6. Step 6: Final answer
    x = 31,973.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.