Home / 20,688.87-28,553.60-11,615.19

Finding the Fourth Proportional to 20,688.87, 28,553.60 and 11,615.19

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Solution

The fourth proportional to 20,688.87, 28,553.60 and 11,615.19 is: 16,030.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.87 : 28,553.60 = 11,615.19 : x
  2. Step 2: Convert to fraction form
    20,688.87/28,553.60 = 11,615.19/x
  3. Step 3: Cross multiply
    20,688.87x = 28,553.60 × 11,615.19
  4. Step 4: Simplify right side
    20,688.87x = 331,655,431.11
  5. Step 5: Solve for x
    x = 331,655,431.11/20,688.87
  6. Step 6: Final answer
    x = 16,030.62

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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.