Home / 20,340.77-28,083.31-13,965.30

Finding the Fourth Proportional to 20,340.77, 28,083.31 and 13,965.30

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Solution

The fourth proportional to 20,340.77, 28,083.31 and 13,965.30 is: 19,281.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.77 : 28,083.31 = 13,965.30 : x
  2. Step 2: Convert to fraction form
    20,340.77/28,083.31 = 13,965.30/x
  3. Step 3: Cross multiply
    20,340.77x = 28,083.31 × 13,965.30
  4. Step 4: Simplify right side
    20,340.77x = 392,191,814.23
  5. Step 5: Solve for x
    x = 392,191,814.23/20,340.77
  6. Step 6: Final answer
    x = 19,281.07

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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.