Home / 15,787.06-21,782.20-9,074.60

Finding the Fourth Proportional to 15,787.06, 21,782.20 and 9,074.60

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Solution

The fourth proportional to 15,787.06, 21,782.20 and 9,074.60 is: 12,520.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.06 : 21,782.20 = 9,074.60 : x
  2. Step 2: Convert to fraction form
    15,787.06/21,782.20 = 9,074.60/x
  3. Step 3: Cross multiply
    15,787.06x = 21,782.20 × 9,074.60
  4. Step 4: Simplify right side
    15,787.06x = 197,664,752.12
  5. Step 5: Solve for x
    x = 197,664,752.12/15,787.06
  6. Step 6: Final answer
    x = 12,520.68

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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.