Home / 21,322.20-31,941.73-12,981.53

Finding the Fourth Proportional to 21,322.20, 31,941.73 and 12,981.53

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Solution

The fourth proportional to 21,322.20, 31,941.73 and 12,981.53 is: 19,446.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.20 : 31,941.73 = 12,981.53 : x
  2. Step 2: Convert to fraction form
    21,322.20/31,941.73 = 12,981.53/x
  3. Step 3: Cross multiply
    21,322.20x = 31,941.73 × 12,981.53
  4. Step 4: Simplify right side
    21,322.20x = 414,652,526.25
  5. Step 5: Solve for x
    x = 414,652,526.25/21,322.20
  6. Step 6: Final answer
    x = 19,446.99

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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.