Home / 21,981.09-30,336.08-12,551.07

Finding the Fourth Proportional to 21,981.09, 30,336.08 and 12,551.07

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Solution

The fourth proportional to 21,981.09, 30,336.08 and 12,551.07 is: 17,321.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.09 : 30,336.08 = 12,551.07 : x
  2. Step 2: Convert to fraction form
    21,981.09/30,336.08 = 12,551.07/x
  3. Step 3: Cross multiply
    21,981.09x = 30,336.08 × 12,551.07
  4. Step 4: Simplify right side
    21,981.09x = 380,750,200.85
  5. Step 5: Solve for x
    x = 380,750,200.85/21,981.09
  6. Step 6: Final answer
    x = 17,321.72

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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.