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Finding the Fourth Proportional to 13,477.60, 20,216.40 and 12,908.80

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Solution

The fourth proportional to 13,477.60, 20,216.40 and 12,908.80 is: 19,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,477.60 : 20,216.40 = 12,908.80 : x
  2. Step 2: Convert to fraction form
    13,477.60/20,216.40 = 12,908.80/x
  3. Step 3: Cross multiply
    13,477.60x = 20,216.40 × 12,908.80
  4. Step 4: Simplify right side
    13,477.60x = 260,969,464.32
  5. Step 5: Solve for x
    x = 260,969,464.32/13,477.60
  6. Step 6: Final answer
    x = 19,363.20

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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.