Home / 15,308.13-21,128.13-9,993.72

Finding the Fourth Proportional to 15,308.13, 21,128.13 and 9,993.72

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Solution

The fourth proportional to 15,308.13, 21,128.13 and 9,993.72 is: 13,793.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,308.13 : 21,128.13 = 9,993.72 : x
  2. Step 2: Convert to fraction form
    15,308.13/21,128.13 = 9,993.72/x
  3. Step 3: Cross multiply
    15,308.13x = 21,128.13 × 9,993.72
  4. Step 4: Simplify right side
    15,308.13x = 211,148,615.34
  5. Step 5: Solve for x
    x = 211,148,615.34/15,308.13
  6. Step 6: Final answer
    x = 13,793.23

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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.