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Finding the Fourth Proportional to 20,707.56, 31,033.66 and 7,547.56

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Solution

The fourth proportional to 20,707.56, 31,033.66 and 7,547.56 is: 11,311.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.56 : 31,033.66 = 7,547.56 : x
  2. Step 2: Convert to fraction form
    20,707.56/31,033.66 = 7,547.56/x
  3. Step 3: Cross multiply
    20,707.56x = 31,033.66 × 7,547.56
  4. Step 4: Simplify right side
    20,707.56x = 234,228,410.87
  5. Step 5: Solve for x
    x = 234,228,410.87/20,707.56
  6. Step 6: Final answer
    x = 11,311.25

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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.