Home / 21,836.60-30,140.10-12,408.20

Finding the Fourth Proportional to 21,836.60, 30,140.10 and 12,408.20

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Solution

The fourth proportional to 21,836.60, 30,140.10 and 12,408.20 is: 17,126.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.60 : 30,140.10 = 12,408.20 : x
  2. Step 2: Convert to fraction form
    21,836.60/30,140.10 = 12,408.20/x
  3. Step 3: Cross multiply
    21,836.60x = 30,140.10 × 12,408.20
  4. Step 4: Simplify right side
    21,836.60x = 373,984,388.82
  5. Step 5: Solve for x
    x = 373,984,388.82/21,836.60
  6. Step 6: Final answer
    x = 17,126.49

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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.