Home / 13,563.60-20,345.40-8,913.20

Finding the Fourth Proportional to 13,563.60, 20,345.40 and 8,913.20

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Solution

The fourth proportional to 13,563.60, 20,345.40 and 8,913.20 is: 13,369.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,563.60 : 20,345.40 = 8,913.20 : x
  2. Step 2: Convert to fraction form
    13,563.60/20,345.40 = 8,913.20/x
  3. Step 3: Cross multiply
    13,563.60x = 20,345.40 × 8,913.20
  4. Step 4: Simplify right side
    13,563.60x = 181,342,517.55
  5. Step 5: Solve for x
    x = 181,342,517.55/13,563.60
  6. Step 6: Final answer
    x = 13,369.79

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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.