Home / 20,803.51-28,710.48-11,851.39

Finding the Fourth Proportional to 20,803.51, 28,710.48 and 11,851.39

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Solution

The fourth proportional to 20,803.51, 28,710.48 and 11,851.39 is: 16,355.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.51 : 28,710.48 = 11,851.39 : x
  2. Step 2: Convert to fraction form
    20,803.51/28,710.48 = 11,851.39/x
  3. Step 3: Cross multiply
    20,803.51x = 28,710.48 × 11,851.39
  4. Step 4: Simplify right side
    20,803.51x = 340,259,095.57
  5. Step 5: Solve for x
    x = 340,259,095.57/20,803.51
  6. Step 6: Final answer
    x = 16,355.85

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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.