Home / 42,921.76-64,386.82-13,331.64

Finding the Fourth Proportional to 42,921.76, 64,386.82 and 13,331.64

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Solution

The fourth proportional to 42,921.76, 64,386.82 and 13,331.64 is: 19,998.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,921.76 : 64,386.82 = 13,331.64 : x
  2. Step 2: Convert to fraction form
    42,921.76/64,386.82 = 13,331.64/x
  3. Step 3: Cross multiply
    42,921.76x = 64,386.82 × 13,331.64
  4. Step 4: Simplify right side
    42,921.76x = 858,381,904.98
  5. Step 5: Solve for x
    x = 858,381,904.98/42,921.76
  6. Step 6: Final answer
    x = 19,998.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.