Home / 21,558.15-29,750.20-12,126.71

Finding the Fourth Proportional to 21,558.15, 29,750.20 and 12,126.71

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Solution

The fourth proportional to 21,558.15, 29,750.20 and 12,126.71 is: 16,734.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.15 : 29,750.20 = 12,126.71 : x
  2. Step 2: Convert to fraction form
    21,558.15/29,750.20 = 12,126.71/x
  3. Step 3: Cross multiply
    21,558.15x = 29,750.20 × 12,126.71
  4. Step 4: Simplify right side
    21,558.15x = 360,772,160.11
  5. Step 5: Solve for x
    x = 360,772,160.11/21,558.15
  6. Step 6: Final answer
    x = 16,734.84

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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.