Home / 20,508.42-28,303.72-12,555.90

Finding the Fourth Proportional to 20,508.42, 28,303.72 and 12,555.90

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Solution

The fourth proportional to 20,508.42, 28,303.72 and 12,555.90 is: 17,328.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.42 : 28,303.72 = 12,555.90 : x
  2. Step 2: Convert to fraction form
    20,508.42/28,303.72 = 12,555.90/x
  3. Step 3: Cross multiply
    20,508.42x = 28,303.72 × 12,555.90
  4. Step 4: Simplify right side
    20,508.42x = 355,378,677.95
  5. Step 5: Solve for x
    x = 355,378,677.95/20,508.42
  6. Step 6: Final answer
    x = 17,328.43

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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.