Home / 20,753.36-28,639.51-11,800.87

Finding the Fourth Proportional to 20,753.36, 28,639.51 and 11,800.87

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Solution

The fourth proportional to 20,753.36, 28,639.51 and 11,800.87 is: 16,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.36 : 28,639.51 = 11,800.87 : x
  2. Step 2: Convert to fraction form
    20,753.36/28,639.51 = 11,800.87/x
  3. Step 3: Cross multiply
    20,753.36x = 28,639.51 × 11,800.87
  4. Step 4: Simplify right side
    20,753.36x = 337,971,134.37
  5. Step 5: Solve for x
    x = 337,971,134.37/20,753.36
  6. Step 6: Final answer
    x = 16,285.13

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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.