Home / 20,840.67-31,273.16-12,536.55

Finding the Fourth Proportional to 20,840.67, 31,273.16 and 12,536.55

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Solution

The fourth proportional to 20,840.67, 31,273.16 and 12,536.55 is: 18,812.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.67 : 31,273.16 = 12,536.55 : x
  2. Step 2: Convert to fraction form
    20,840.67/31,273.16 = 12,536.55/x
  3. Step 3: Cross multiply
    20,840.67x = 31,273.16 × 12,536.55
  4. Step 4: Simplify right side
    20,840.67x = 392,057,534.00
  5. Step 5: Solve for x
    x = 392,057,534.00/20,840.67
  6. Step 6: Final answer
    x = 18,812.14

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1.5x scale

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.