Home / 20,803.96-28,708.86-11,372.32

Finding the Fourth Proportional to 20,803.96, 28,708.86 and 11,372.32

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Solution

The fourth proportional to 20,803.96, 28,708.86 and 11,372.32 is: 15,693.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.96 : 28,708.86 = 11,372.32 : x
  2. Step 2: Convert to fraction form
    20,803.96/28,708.86 = 11,372.32/x
  3. Step 3: Cross multiply
    20,803.96x = 28,708.86 × 11,372.32
  4. Step 4: Simplify right side
    20,803.96x = 326,486,342.76
  5. Step 5: Solve for x
    x = 326,486,342.76/20,803.96
  6. Step 6: Final answer
    x = 15,693.47

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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.