Home / 20,788.85-28,688.55-11,357.48

Finding the Fourth Proportional to 20,788.85, 28,688.55 and 11,357.48

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Solution

The fourth proportional to 20,788.85, 28,688.55 and 11,357.48 is: 15,673.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.85 : 28,688.55 = 11,357.48 : x
  2. Step 2: Convert to fraction form
    20,788.85/28,688.55 = 11,357.48/x
  3. Step 3: Cross multiply
    20,788.85x = 28,688.55 × 11,357.48
  4. Step 4: Simplify right side
    20,788.85x = 325,829,489.41
  5. Step 5: Solve for x
    x = 325,829,489.41/20,788.85
  6. Step 6: Final answer
    x = 15,673.28

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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.