Home / 28,318.20-39,089.72-21,265

Finding the Fourth Proportional to 28,318.20, 39,089.72 and 21,265

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Solution

The fourth proportional to 28,318.20, 39,089.72 and 21,265 is: 29,353.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.20 : 39,089.72 = 21,265 : x
  2. Step 2: Convert to fraction form
    28,318.20/39,089.72 = 21,265/x
  3. Step 3: Cross multiply
    28,318.20x = 39,089.72 × 21,265
  4. Step 4: Simplify right side
    28,318.20x = 831,242,895.80
  5. Step 5: Solve for x
    x = 831,242,895.80/28,318.20
  6. Step 6: Final answer
    x = 29,353.66

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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.