Home / 13,423.68-20,116.80-7,880.64

Finding the Fourth Proportional to 13,423.68, 20,116.80 and 7,880.64

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Solution

The fourth proportional to 13,423.68, 20,116.80 and 7,880.64 is: 11,809.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.68 : 20,116.80 = 7,880.64 : x
  2. Step 2: Convert to fraction form
    13,423.68/20,116.80 = 7,880.64/x
  3. Step 3: Cross multiply
    13,423.68x = 20,116.80 × 7,880.64
  4. Step 4: Simplify right side
    13,423.68x = 158,533,258.75
  5. Step 5: Solve for x
    x = 158,533,258.75/13,423.68
  6. Step 6: Final answer
    x = 11,809.97

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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.