Home / 15,220.13-21,003.74-8,505.76

Finding the Fourth Proportional to 15,220.13, 21,003.74 and 8,505.76

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Solution

The fourth proportional to 15,220.13, 21,003.74 and 8,505.76 is: 11,737.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.13 : 21,003.74 = 8,505.76 : x
  2. Step 2: Convert to fraction form
    15,220.13/21,003.74 = 8,505.76/x
  3. Step 3: Cross multiply
    15,220.13x = 21,003.74 × 8,505.76
  4. Step 4: Simplify right side
    15,220.13x = 178,652,747.78
  5. Step 5: Solve for x
    x = 178,652,747.78/15,220.13
  6. Step 6: Final answer
    x = 11,737.93

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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.