Home / 13,253.60-19,880.40-12,378.80

Finding the Fourth Proportional to 13,253.60, 19,880.40 and 12,378.80

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Solution

The fourth proportional to 13,253.60, 19,880.40 and 12,378.80 is: 18,568.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,253.60 : 19,880.40 = 12,378.80 : x
  2. Step 2: Convert to fraction form
    13,253.60/19,880.40 = 12,378.80/x
  3. Step 3: Cross multiply
    13,253.60x = 19,880.40 × 12,378.80
  4. Step 4: Simplify right side
    13,253.60x = 246,095,495.52
  5. Step 5: Solve for x
    x = 246,095,495.52/13,253.60
  6. Step 6: Final answer
    x = 18,568.20

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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.