Home / 20,420.29-30,617.34-8,581.74

Finding the Fourth Proportional to 20,420.29, 30,617.34 and 8,581.74

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Solution

The fourth proportional to 20,420.29, 30,617.34 and 8,581.74 is: 12,867.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.29 : 30,617.34 = 8,581.74 : x
  2. Step 2: Convert to fraction form
    20,420.29/30,617.34 = 8,581.74/x
  3. Step 3: Cross multiply
    20,420.29x = 30,617.34 × 8,581.74
  4. Step 4: Simplify right side
    20,420.29x = 262,750,051.37
  5. Step 5: Solve for x
    x = 262,750,051.37/20,420.29
  6. Step 6: Final answer
    x = 12,867.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.