Home / 13,617.86-20,420.40-5,718.68

Finding the Fourth Proportional to 13,617.86, 20,420.40 and 5,718.68

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Solution

The fourth proportional to 13,617.86, 20,420.40 and 5,718.68 is: 8,575.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.86 : 20,420.40 = 5,718.68 : x
  2. Step 2: Convert to fraction form
    13,617.86/20,420.40 = 5,718.68/x
  3. Step 3: Cross multiply
    13,617.86x = 20,420.40 × 5,718.68
  4. Step 4: Simplify right side
    13,617.86x = 116,777,784.12
  5. Step 5: Solve for x
    x = 116,777,784.12/13,617.86
  6. Step 6: Final answer
    x = 8,575.34

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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.