Home / 20,688-31,028.27-8,848.43

Finding the Fourth Proportional to 20,688, 31,028.27 and 8,848.43

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Solution

The fourth proportional to 20,688, 31,028.27 and 8,848.43 is: 13,271.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688 : 31,028.27 = 8,848.43 : x
  2. Step 2: Convert to fraction form
    20,688/31,028.27 = 8,848.43/x
  3. Step 3: Cross multiply
    20,688x = 31,028.27 × 8,848.43
  4. Step 4: Simplify right side
    20,688x = 274,551,275.73
  5. Step 5: Solve for x
    x = 274,551,275.73/20,688
  6. Step 6: Final answer
    x = 13,271.04

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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.