Home / 5,206.13-7,809.20-2,128.13

Finding the Fourth Proportional to 5,206.13, 7,809.20 and 2,128.13

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Solution

The fourth proportional to 5,206.13, 7,809.20 and 2,128.13 is: 3,192.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,206.13 : 7,809.20 = 2,128.13 : x
  2. Step 2: Convert to fraction form
    5,206.13/7,809.20 = 2,128.13/x
  3. Step 3: Cross multiply
    5,206.13x = 7,809.20 × 2,128.13
  4. Step 4: Simplify right side
    5,206.13x = 16,618,943.11
  5. Step 5: Solve for x
    x = 16,618,943.11/5,206.13
  6. Step 6: Final answer
    x = 3,192.19

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Half scale
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Double scale
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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.