Home / 21,190.02-31,787.82-7,861.20

Finding the Fourth Proportional to 21,190.02, 31,787.82 and 7,861.20

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Solution

The fourth proportional to 21,190.02, 31,787.82 and 7,861.20 is: 11,792.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.02 : 31,787.82 = 7,861.20 : x
  2. Step 2: Convert to fraction form
    21,190.02/31,787.82 = 7,861.20/x
  3. Step 3: Cross multiply
    21,190.02x = 31,787.82 × 7,861.20
  4. Step 4: Simplify right side
    21,190.02x = 249,890,410.58
  5. Step 5: Solve for x
    x = 249,890,410.58/21,190.02
  6. Step 6: Final answer
    x = 11,792.84

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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.