Home / 13,490.40-20,232.72-6,909.60

Finding the Fourth Proportional to 13,490.40, 20,232.72 and 6,909.60

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Solution

The fourth proportional to 13,490.40, 20,232.72 and 6,909.60 is: 10,362.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.40 : 20,232.72 = 6,909.60 : x
  2. Step 2: Convert to fraction form
    13,490.40/20,232.72 = 6,909.60/x
  3. Step 3: Cross multiply
    13,490.40x = 20,232.72 × 6,909.60
  4. Step 4: Simplify right side
    13,490.40x = 139,800,002.11
  5. Step 5: Solve for x
    x = 139,800,002.11/13,490.40
  6. Step 6: Final answer
    x = 10,362.92

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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.