Home / 20,682.31-28,555.13-14,328.39

Finding the Fourth Proportional to 20,682.31, 28,555.13 and 14,328.39

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Solution

The fourth proportional to 20,682.31, 28,555.13 and 14,328.39 is: 19,782.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.31 : 28,555.13 = 14,328.39 : x
  2. Step 2: Convert to fraction form
    20,682.31/28,555.13 = 14,328.39/x
  3. Step 3: Cross multiply
    20,682.31x = 28,555.13 × 14,328.39
  4. Step 4: Simplify right side
    20,682.31x = 409,149,182.04
  5. Step 5: Solve for x
    x = 409,149,182.04/20,682.31
  6. Step 6: Final answer
    x = 19,782.56

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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.