Home / 21,280.25-29,353.43-15,302.45

Finding the Fourth Proportional to 21,280.25, 29,353.43 and 15,302.45

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Solution

The fourth proportional to 21,280.25, 29,353.43 and 15,302.45 is: 21,107.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.25 : 29,353.43 = 15,302.45 : x
  2. Step 2: Convert to fraction form
    21,280.25/29,353.43 = 15,302.45/x
  3. Step 3: Cross multiply
    21,280.25x = 29,353.43 × 15,302.45
  4. Step 4: Simplify right side
    21,280.25x = 449,179,171.62
  5. Step 5: Solve for x
    x = 449,179,171.62/21,280.25
  6. Step 6: Final answer
    x = 21,107.80

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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.