Home / 21,156.21-31,724.06-12,394.17

Finding the Fourth Proportional to 21,156.21, 31,724.06 and 12,394.17

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Solution

The fourth proportional to 21,156.21, 31,724.06 and 12,394.17 is: 18,585.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.21 : 31,724.06 = 12,394.17 : x
  2. Step 2: Convert to fraction form
    21,156.21/31,724.06 = 12,394.17/x
  3. Step 3: Cross multiply
    21,156.21x = 31,724.06 × 12,394.17
  4. Step 4: Simplify right side
    21,156.21x = 393,193,330.76
  5. Step 5: Solve for x
    x = 393,193,330.76/21,156.21
  6. Step 6: Final answer
    x = 18,585.24

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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.