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Finding the Fourth Proportional to 20,357.77, 30,532.99 and 7,210.21

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Solution

The fourth proportional to 20,357.77, 30,532.99 and 7,210.21 is: 10,814.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.77 : 30,532.99 = 7,210.21 : x
  2. Step 2: Convert to fraction form
    20,357.77/30,532.99 = 7,210.21/x
  3. Step 3: Cross multiply
    20,357.77x = 30,532.99 × 7,210.21
  4. Step 4: Simplify right side
    20,357.77x = 220,149,269.83
  5. Step 5: Solve for x
    x = 220,149,269.83/20,357.77
  6. Step 6: Final answer
    x = 10,814.02

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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.