Home / 20,743.08-31,120.80-9,656.32

Finding the Fourth Proportional to 20,743.08, 31,120.80 and 9,656.32

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Solution

The fourth proportional to 20,743.08, 31,120.80 and 9,656.32 is: 14,487.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.08 : 31,120.80 = 9,656.32 : x
  2. Step 2: Convert to fraction form
    20,743.08/31,120.80 = 9,656.32/x
  3. Step 3: Cross multiply
    20,743.08x = 31,120.80 × 9,656.32
  4. Step 4: Simplify right side
    20,743.08x = 300,512,403.46
  5. Step 5: Solve for x
    x = 300,512,403.46/20,743.08
  6. Step 6: Final answer
    x = 14,487.36

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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.