Home / 20,739.89-28,621.35-11,308.46

Finding the Fourth Proportional to 20,739.89, 28,621.35 and 11,308.46

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Solution

The fourth proportional to 20,739.89, 28,621.35 and 11,308.46 is: 15,605.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.89 : 28,621.35 = 11,308.46 : x
  2. Step 2: Convert to fraction form
    20,739.89/28,621.35 = 11,308.46/x
  3. Step 3: Cross multiply
    20,739.89x = 28,621.35 × 11,308.46
  4. Step 4: Simplify right side
    20,739.89x = 323,663,248.51
  5. Step 5: Solve for x
    x = 323,663,248.51/20,739.89
  6. Step 6: Final answer
    x = 15,605.83

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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.