Home / 51,005.12-76,537.24-21,420.40

Finding the Fourth Proportional to 51,005.12, 76,537.24 and 21,420.40

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Solution

The fourth proportional to 51,005.12, 76,537.24 and 21,420.40 is: 32,143.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,005.12 : 76,537.24 = 21,420.40 : x
  2. Step 2: Convert to fraction form
    51,005.12/76,537.24 = 21,420.40/x
  3. Step 3: Cross multiply
    51,005.12x = 76,537.24 × 21,420.40
  4. Step 4: Simplify right side
    51,005.12x = 1,639,458,295.70
  5. Step 5: Solve for x
    x = 1,639,458,295.70/51,005.12
  6. Step 6: Final answer
    x = 32,143.01

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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.