Home / 20,147.86-30,235.56-7,000.21

Finding the Fourth Proportional to 20,147.86, 30,235.56 and 7,000.21

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Solution

The fourth proportional to 20,147.86, 30,235.56 and 7,000.21 is: 10,505.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.86 : 30,235.56 = 7,000.21 : x
  2. Step 2: Convert to fraction form
    20,147.86/30,235.56 = 7,000.21/x
  3. Step 3: Cross multiply
    20,147.86x = 30,235.56 × 7,000.21
  4. Step 4: Simplify right side
    20,147.86x = 211,655,269.47
  5. Step 5: Solve for x
    x = 211,655,269.47/20,147.86
  6. Step 6: Final answer
    x = 10,505.10

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Half scale
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Double scale
Find fourth proportional to 20,148.86, 30,237.06 and 7,001.21
Similar ratio
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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.