Home / 13,103.40-19,644.72-12,210.75

Finding the Fourth Proportional to 13,103.40, 19,644.72 and 12,210.75

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Solution

The fourth proportional to 13,103.40, 19,644.72 and 12,210.75 is: 18,306.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,103.40 : 19,644.72 = 12,210.75 : x
  2. Step 2: Convert to fraction form
    13,103.40/19,644.72 = 12,210.75/x
  3. Step 3: Cross multiply
    13,103.40x = 19,644.72 × 12,210.75
  4. Step 4: Simplify right side
    13,103.40x = 239,876,764.74
  5. Step 5: Solve for x
    x = 239,876,764.74/13,103.40
  6. Step 6: Final answer
    x = 18,306.45

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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.