Home / 15,761.84-21,751.31-8,688.24

Finding the Fourth Proportional to 15,761.84, 21,751.31 and 8,688.24

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Solution

The fourth proportional to 15,761.84, 21,751.31 and 8,688.24 is: 11,989.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.84 : 21,751.31 = 8,688.24 : x
  2. Step 2: Convert to fraction form
    15,761.84/21,751.31 = 8,688.24/x
  3. Step 3: Cross multiply
    15,761.84x = 21,751.31 × 8,688.24
  4. Step 4: Simplify right side
    15,761.84x = 188,980,558.15
  5. Step 5: Solve for x
    x = 188,980,558.15/15,761.84
  6. Step 6: Final answer
    x = 11,989.76

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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.