Home / 15,224.16-21,009.28-8,509.78

Finding the Fourth Proportional to 15,224.16, 21,009.28 and 8,509.78

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Solution

The fourth proportional to 15,224.16, 21,009.28 and 8,509.78 is: 11,743.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,224.16 : 21,009.28 = 8,509.78 : x
  2. Step 2: Convert to fraction form
    15,224.16/21,009.28 = 8,509.78/x
  3. Step 3: Cross multiply
    15,224.16x = 21,009.28 × 8,509.78
  4. Step 4: Simplify right side
    15,224.16x = 178,784,350.76
  5. Step 5: Solve for x
    x = 178,784,350.76/15,224.16
  6. Step 6: Final answer
    x = 11,743.46

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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.