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Finding the Fourth Proportional to 20,693.70, 31,041.12 and 7,555.86

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Solution

The fourth proportional to 20,693.70, 31,041.12 and 7,555.86 is: 11,334.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693.70 : 31,041.12 = 7,555.86 : x
  2. Step 2: Convert to fraction form
    20,693.70/31,041.12 = 7,555.86/x
  3. Step 3: Cross multiply
    20,693.70x = 31,041.12 × 7,555.86
  4. Step 4: Simplify right side
    20,693.70x = 234,542,356.96
  5. Step 5: Solve for x
    x = 234,542,356.96/20,693.70
  6. Step 6: Final answer
    x = 11,334.00

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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.