Home / 13,017.89-17,960.74-7,980.27

Finding the Fourth Proportional to 13,017.89, 17,960.74 and 7,980.27

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Solution

The fourth proportional to 13,017.89, 17,960.74 and 7,980.27 is: 11,010.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,017.89 : 17,960.74 = 7,980.27 : x
  2. Step 2: Convert to fraction form
    13,017.89/17,960.74 = 7,980.27/x
  3. Step 3: Cross multiply
    13,017.89x = 17,960.74 × 7,980.27
  4. Step 4: Simplify right side
    13,017.89x = 143,331,568.33
  5. Step 5: Solve for x
    x = 143,331,568.33/13,017.89
  6. Step 6: Final answer
    x = 11,010.35

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.