Home / 15,222.89-21,009.56-8,509.91

Finding the Fourth Proportional to 15,222.89, 21,009.56 and 8,509.91

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Solution

The fourth proportional to 15,222.89, 21,009.56 and 8,509.91 is: 11,744.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,222.89 : 21,009.56 = 8,509.91 : x
  2. Step 2: Convert to fraction form
    15,222.89/21,009.56 = 8,509.91/x
  3. Step 3: Cross multiply
    15,222.89x = 21,009.56 × 8,509.91
  4. Step 4: Simplify right side
    15,222.89x = 178,789,317.14
  5. Step 5: Solve for x
    x = 178,789,317.14/15,222.89
  6. Step 6: Final answer
    x = 11,744.77

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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.