Home / 20,788.47-28,688.10-11,357.03

Finding the Fourth Proportional to 20,788.47, 28,688.10 and 11,357.03

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Solution

The fourth proportional to 20,788.47, 28,688.10 and 11,357.03 is: 15,672.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.47 : 28,688.10 = 11,357.03 : x
  2. Step 2: Convert to fraction form
    20,788.47/28,688.10 = 11,357.03/x
  3. Step 3: Cross multiply
    20,788.47x = 28,688.10 × 11,357.03
  4. Step 4: Simplify right side
    20,788.47x = 325,811,612.34
  5. Step 5: Solve for x
    x = 325,811,612.34/20,788.47
  6. Step 6: Final answer
    x = 15,672.71

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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.