Home / 20,740.32-28,621.44-11,308.32

Finding the Fourth Proportional to 20,740.32, 28,621.44 and 11,308.32

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Solution

The fourth proportional to 20,740.32, 28,621.44 and 11,308.32 is: 15,605.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.32 : 28,621.44 = 11,308.32 : x
  2. Step 2: Convert to fraction form
    20,740.32/28,621.44 = 11,308.32/x
  3. Step 3: Cross multiply
    20,740.32x = 28,621.44 × 11,308.32
  4. Step 4: Simplify right side
    20,740.32x = 323,660,402.38
  5. Step 5: Solve for x
    x = 323,660,402.38/20,740.32
  6. Step 6: Final answer
    x = 15,605.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.