Home / 20,765.46-31,148.64-7,439.32

Finding the Fourth Proportional to 20,765.46, 31,148.64 and 7,439.32

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Solution

The fourth proportional to 20,765.46, 31,148.64 and 7,439.32 is: 11,159.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.46 : 31,148.64 = 7,439.32 : x
  2. Step 2: Convert to fraction form
    20,765.46/31,148.64 = 7,439.32/x
  3. Step 3: Cross multiply
    20,765.46x = 31,148.64 × 7,439.32
  4. Step 4: Simplify right side
    20,765.46x = 231,724,739.46
  5. Step 5: Solve for x
    x = 231,724,739.46/20,765.46
  6. Step 6: Final answer
    x = 11,159.14

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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.