Home / 21,512.66-29,688.14-12,081.43

Finding the Fourth Proportional to 21,512.66, 29,688.14 and 12,081.43

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Solution

The fourth proportional to 21,512.66, 29,688.14 and 12,081.43 is: 16,672.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.66 : 29,688.14 = 12,081.43 : x
  2. Step 2: Convert to fraction form
    21,512.66/29,688.14 = 12,081.43/x
  3. Step 3: Cross multiply
    21,512.66x = 29,688.14 × 12,081.43
  4. Step 4: Simplify right side
    21,512.66x = 358,674,976.39
  5. Step 5: Solve for x
    x = 358,674,976.39/21,512.66
  6. Step 6: Final answer
    x = 16,672.74

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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.