Home / 13,491.60-20,215.80-8,869.20

Finding the Fourth Proportional to 13,491.60, 20,215.80 and 8,869.20

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Solution

The fourth proportional to 13,491.60, 20,215.80 and 8,869.20 is: 13,289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.60 : 20,215.80 = 8,869.20 : x
  2. Step 2: Convert to fraction form
    13,491.60/20,215.80 = 8,869.20/x
  3. Step 3: Cross multiply
    13,491.60x = 20,215.80 × 8,869.20
  4. Step 4: Simplify right side
    13,491.60x = 179,297,973.36
  5. Step 5: Solve for x
    x = 179,297,973.36/13,491.60
  6. Step 6: Final answer
    x = 13,289.60

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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.