Home / 21,163.80-31,756.50-8,693.40

Finding the Fourth Proportional to 21,163.80, 31,756.50 and 8,693.40

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Solution

The fourth proportional to 21,163.80, 31,756.50 and 8,693.40 is: 13,044.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.80 : 31,756.50 = 8,693.40 : x
  2. Step 2: Convert to fraction form
    21,163.80/31,756.50 = 8,693.40/x
  3. Step 3: Cross multiply
    21,163.80x = 31,756.50 × 8,693.40
  4. Step 4: Simplify right side
    21,163.80x = 276,071,957.10
  5. Step 5: Solve for x
    x = 276,071,957.10/21,163.80
  6. Step 6: Final answer
    x = 13,044.54

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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.