Home / 21,171.44-31,756.18-8,688.38

Finding the Fourth Proportional to 21,171.44, 31,756.18 and 8,688.38

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Solution

The fourth proportional to 21,171.44, 31,756.18 and 8,688.38 is: 13,032.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.44 : 31,756.18 = 8,688.38 : x
  2. Step 2: Convert to fraction form
    21,171.44/31,756.18 = 8,688.38/x
  3. Step 3: Cross multiply
    21,171.44x = 31,756.18 × 8,688.38
  4. Step 4: Simplify right side
    21,171.44x = 275,909,759.19
  5. Step 5: Solve for x
    x = 275,909,759.19/21,171.44
  6. Step 6: Final answer
    x = 13,032.17

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1.5x scale

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.