Home / 21,077.62-29,091.20-13,533.48

Finding the Fourth Proportional to 21,077.62, 29,091.20 and 13,533.48

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Solution

The fourth proportional to 21,077.62, 29,091.20 and 13,533.48 is: 18,678.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.62 : 29,091.20 = 13,533.48 : x
  2. Step 2: Convert to fraction form
    21,077.62/29,091.20 = 13,533.48/x
  3. Step 3: Cross multiply
    21,077.62x = 29,091.20 × 13,533.48
  4. Step 4: Simplify right side
    21,077.62x = 393,705,105.71
  5. Step 5: Solve for x
    x = 393,705,105.71/21,077.62
  6. Step 6: Final answer
    x = 18,678.82

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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.