Home / 15,228.76-21,015.56-8,514.40

Finding the Fourth Proportional to 15,228.76, 21,015.56 and 8,514.40

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Solution

The fourth proportional to 15,228.76, 21,015.56 and 8,514.40 is: 11,749.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,228.76 : 21,015.56 = 8,514.40 : x
  2. Step 2: Convert to fraction form
    15,228.76/21,015.56 = 8,514.40/x
  3. Step 3: Cross multiply
    15,228.76x = 21,015.56 × 8,514.40
  4. Step 4: Simplify right side
    15,228.76x = 178,934,884.06
  5. Step 5: Solve for x
    x = 178,934,884.06/15,228.76
  6. Step 6: Final answer
    x = 11,749.80

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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.