Home / 13,340.76-20,012.16-3,980.06

Finding the Fourth Proportional to 13,340.76, 20,012.16 and 3,980.06

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Solution

The fourth proportional to 13,340.76, 20,012.16 and 3,980.06 is: 5,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,340.76 : 20,012.16 = 3,980.06 : x
  2. Step 2: Convert to fraction form
    13,340.76/20,012.16 = 3,980.06/x
  3. Step 3: Cross multiply
    13,340.76x = 20,012.16 × 3,980.06
  4. Step 4: Simplify right side
    13,340.76x = 79,649,597.53
  5. Step 5: Solve for x
    x = 79,649,597.53/13,340.76
  6. Step 6: Final answer
    x = 5,970.39

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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.