Home / 18,520.12-25,557.78-10,136.62

Finding the Fourth Proportional to 18,520.12, 25,557.78 and 10,136.62

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Solution

The fourth proportional to 18,520.12, 25,557.78 and 10,136.62 is: 13,988.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.12 : 25,557.78 = 10,136.62 : x
  2. Step 2: Convert to fraction form
    18,520.12/25,557.78 = 10,136.62/x
  3. Step 3: Cross multiply
    18,520.12x = 25,557.78 × 10,136.62
  4. Step 4: Simplify right side
    18,520.12x = 259,069,503.90
  5. Step 5: Solve for x
    x = 259,069,503.90/18,520.12
  6. Step 6: Final answer
    x = 13,988.54

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Half scale
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Double scale
Find fourth proportional to 18,521.12, 25,559.16 and 10,137.62
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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.