Home / 15,761.37-21,751.70-8,688.45

Finding the Fourth Proportional to 15,761.37, 21,751.70 and 8,688.45

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Solution

The fourth proportional to 15,761.37, 21,751.70 and 8,688.45 is: 11,990.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.37 : 21,751.70 = 8,688.45 : x
  2. Step 2: Convert to fraction form
    15,761.37/21,751.70 = 8,688.45/x
  3. Step 3: Cross multiply
    15,761.37x = 21,751.70 × 8,688.45
  4. Step 4: Simplify right side
    15,761.37x = 188,988,579.59
  5. Step 5: Solve for x
    x = 188,988,579.59/15,761.37
  6. Step 6: Final answer
    x = 11,990.62

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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.