Home / 20,851.64-28,775.54-11,420.27

Finding the Fourth Proportional to 20,851.64, 28,775.54 and 11,420.27

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Solution

The fourth proportional to 20,851.64, 28,775.54 and 11,420.27 is: 15,760.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.64 : 28,775.54 = 11,420.27 : x
  2. Step 2: Convert to fraction form
    20,851.64/28,775.54 = 11,420.27/x
  3. Step 3: Cross multiply
    20,851.64x = 28,775.54 × 11,420.27
  4. Step 4: Simplify right side
    20,851.64x = 328,624,320.87
  5. Step 5: Solve for x
    x = 328,624,320.87/20,851.64
  6. Step 6: Final answer
    x = 15,760.12

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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.