Home / 20,438.72-30,657.77-5,647.31

Finding the Fourth Proportional to 20,438.72, 30,657.77 and 5,647.31

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Solution

The fourth proportional to 20,438.72, 30,657.77 and 5,647.31 is: 8,470.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.72 : 30,657.77 = 5,647.31 : x
  2. Step 2: Convert to fraction form
    20,438.72/30,657.77 = 5,647.31/x
  3. Step 3: Cross multiply
    20,438.72x = 30,657.77 × 5,647.31
  4. Step 4: Simplify right side
    20,438.72x = 173,133,979.51
  5. Step 5: Solve for x
    x = 173,133,979.51/20,438.72
  6. Step 6: Final answer
    x = 8,470.88

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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.