Home / 15,420.74-21,279.44-8,707.04

Finding the Fourth Proportional to 15,420.74, 21,279.44 and 8,707.04

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Solution

The fourth proportional to 15,420.74, 21,279.44 and 8,707.04 is: 12,015.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.74 : 21,279.44 = 8,707.04 : x
  2. Step 2: Convert to fraction form
    15,420.74/21,279.44 = 8,707.04/x
  3. Step 3: Cross multiply
    15,420.74x = 21,279.44 × 8,707.04
  4. Step 4: Simplify right side
    15,420.74x = 185,280,785.33
  5. Step 5: Solve for x
    x = 185,280,785.33/15,420.74
  6. Step 6: Final answer
    x = 12,015.04

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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.