Home / 14,120.60-21,172.80-4,258.40

Finding the Fourth Proportional to 14,120.60, 21,172.80 and 4,258.40

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Solution

The fourth proportional to 14,120.60, 21,172.80 and 4,258.40 is: 6,385.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,120.60 : 21,172.80 = 4,258.40 : x
  2. Step 2: Convert to fraction form
    14,120.60/21,172.80 = 4,258.40/x
  3. Step 3: Cross multiply
    14,120.60x = 21,172.80 × 4,258.40
  4. Step 4: Simplify right side
    14,120.60x = 90,162,251.52
  5. Step 5: Solve for x
    x = 90,162,251.52/14,120.60
  6. Step 6: Final answer
    x = 6,385.16

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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.