Home / 21,836.55-30,135.51-12,279.45

Finding the Fourth Proportional to 21,836.55, 30,135.51 and 12,279.45

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Solution

The fourth proportional to 21,836.55, 30,135.51 and 12,279.45 is: 16,946.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.55 : 30,135.51 = 12,279.45 : x
  2. Step 2: Convert to fraction form
    21,836.55/30,135.51 = 12,279.45/x
  3. Step 3: Cross multiply
    21,836.55x = 30,135.51 × 12,279.45
  4. Step 4: Simplify right side
    21,836.55x = 370,047,481.30
  5. Step 5: Solve for x
    x = 370,047,481.30/21,836.55
  6. Step 6: Final answer
    x = 16,946.24

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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.