Home / 20,820.06-31,230.50-7,665.66

Finding the Fourth Proportional to 20,820.06, 31,230.50 and 7,665.66

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Solution

The fourth proportional to 20,820.06, 31,230.50 and 7,665.66 is: 11,498.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.06 : 31,230.50 = 7,665.66 : x
  2. Step 2: Convert to fraction form
    20,820.06/31,230.50 = 7,665.66/x
  3. Step 3: Cross multiply
    20,820.06x = 31,230.50 × 7,665.66
  4. Step 4: Simplify right side
    20,820.06x = 239,402,356.30
  5. Step 5: Solve for x
    x = 239,402,356.30/20,820.06
  6. Step 6: Final answer
    x = 11,498.64

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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.