Home / 21,102.87-31,665.32-15,307.32

Finding the Fourth Proportional to 21,102.87, 31,665.32 and 15,307.32

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Solution

The fourth proportional to 21,102.87, 31,665.32 and 15,307.32 is: 22,968.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.87 : 31,665.32 = 15,307.32 : x
  2. Step 2: Convert to fraction form
    21,102.87/31,665.32 = 15,307.32/x
  3. Step 3: Cross multiply
    21,102.87x = 31,665.32 × 15,307.32
  4. Step 4: Simplify right side
    21,102.87x = 484,711,109.61
  5. Step 5: Solve for x
    x = 484,711,109.61/21,102.87
  6. Step 6: Final answer
    x = 22,968.97

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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.