Home / 20,836.98-31,263.30-12,408.36

Finding the Fourth Proportional to 20,836.98, 31,263.30 and 12,408.36

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Solution

The fourth proportional to 20,836.98, 31,263.30 and 12,408.36 is: 18,617.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.98 : 31,263.30 = 12,408.36 : x
  2. Step 2: Convert to fraction form
    20,836.98/31,263.30 = 12,408.36/x
  3. Step 3: Cross multiply
    20,836.98x = 31,263.30 × 12,408.36
  4. Step 4: Simplify right side
    20,836.98x = 387,926,281.19
  5. Step 5: Solve for x
    x = 387,926,281.19/20,836.98
  6. Step 6: Final answer
    x = 18,617.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.