Home / 54,455.40-81,666.90-21,156.30

Finding the Fourth Proportional to 54,455.40, 81,666.90 and 21,156.30

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Solution

The fourth proportional to 54,455.40, 81,666.90 and 21,156.30 is: 31,728.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,455.40 : 81,666.90 = 21,156.30 : x
  2. Step 2: Convert to fraction form
    54,455.40/81,666.90 = 21,156.30/x
  3. Step 3: Cross multiply
    54,455.40x = 81,666.90 × 21,156.30
  4. Step 4: Simplify right side
    54,455.40x = 1,727,769,436.47
  5. Step 5: Solve for x
    x = 1,727,769,436.47/54,455.40
  6. Step 6: Final answer
    x = 31,728.16

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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.