Home / 20,558.45-28,371.18-12,605.06

Finding the Fourth Proportional to 20,558.45, 28,371.18 and 12,605.06

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Solution

The fourth proportional to 20,558.45, 28,371.18 and 12,605.06 is: 17,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.45 : 28,371.18 = 12,605.06 : x
  2. Step 2: Convert to fraction form
    20,558.45/28,371.18 = 12,605.06/x
  3. Step 3: Cross multiply
    20,558.45x = 28,371.18 × 12,605.06
  4. Step 4: Simplify right side
    20,558.45x = 357,620,284.31
  5. Step 5: Solve for x
    x = 357,620,284.31/20,558.45
  6. Step 6: Final answer
    x = 17,395.30

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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.