Home / 21,161.18-31,679.44-15,639.14

Finding the Fourth Proportional to 21,161.18, 31,679.44 and 15,639.14

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Solution

The fourth proportional to 21,161.18, 31,679.44 and 15,639.14 is: 23,412.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.18 : 31,679.44 = 15,639.14 : x
  2. Step 2: Convert to fraction form
    21,161.18/31,679.44 = 15,639.14/x
  3. Step 3: Cross multiply
    21,161.18x = 31,679.44 × 15,639.14
  4. Step 4: Simplify right side
    21,161.18x = 495,439,237.38
  5. Step 5: Solve for x
    x = 495,439,237.38/21,161.18
  6. Step 6: Final answer
    x = 23,412.64

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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.