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Finding the Fourth Proportional to 20,710.56, 31,038.16 and 7,550.56

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Solution

The fourth proportional to 20,710.56, 31,038.16 and 7,550.56 is: 11,315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.56 : 31,038.16 = 7,550.56 : x
  2. Step 2: Convert to fraction form
    20,710.56/31,038.16 = 7,550.56/x
  3. Step 3: Cross multiply
    20,710.56x = 31,038.16 × 7,550.56
  4. Step 4: Simplify right side
    20,710.56x = 234,355,489.37
  5. Step 5: Solve for x
    x = 234,355,489.37/20,710.56
  6. Step 6: Final answer
    x = 11,315.75

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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.