Home / 13,888.20-19,162.65-8,220.12

Finding the Fourth Proportional to 13,888.20, 19,162.65 and 8,220.12

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Solution

The fourth proportional to 13,888.20, 19,162.65 and 8,220.12 is: 11,341.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.20 : 19,162.65 = 8,220.12 : x
  2. Step 2: Convert to fraction form
    13,888.20/19,162.65 = 8,220.12/x
  3. Step 3: Cross multiply
    13,888.20x = 19,162.65 × 8,220.12
  4. Step 4: Simplify right side
    13,888.20x = 157,519,282.52
  5. Step 5: Solve for x
    x = 157,519,282.52/13,888.20
  6. Step 6: Final answer
    x = 11,341.95

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Half scale
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Double scale
Find fourth proportional to 13,889.20, 19,164.03 and 8,221.12
Similar ratio
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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.