Home / 5,389.19-7,437.99-3,980.19

Finding the Fourth Proportional to 5,389.19, 7,437.99 and 3,980.19

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Solution

The fourth proportional to 5,389.19, 7,437.99 and 3,980.19 is: 5,493.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.19 : 7,437.99 = 3,980.19 : x
  2. Step 2: Convert to fraction form
    5,389.19/7,437.99 = 3,980.19/x
  3. Step 3: Cross multiply
    5,389.19x = 7,437.99 × 3,980.19
  4. Step 4: Simplify right side
    5,389.19x = 29,604,613.42
  5. Step 5: Solve for x
    x = 29,604,613.42/5,389.19
  6. Step 6: Final answer
    x = 5,493.33

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Half scale
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Double scale
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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.