Home / 14,143.60-21,215.40-12,612.70

Finding the Fourth Proportional to 14,143.60, 21,215.40 and 12,612.70

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Solution

The fourth proportional to 14,143.60, 21,215.40 and 12,612.70 is: 18,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,143.60 : 21,215.40 = 12,612.70 : x
  2. Step 2: Convert to fraction form
    14,143.60/21,215.40 = 12,612.70/x
  3. Step 3: Cross multiply
    14,143.60x = 21,215.40 × 12,612.70
  4. Step 4: Simplify right side
    14,143.60x = 267,583,475.58
  5. Step 5: Solve for x
    x = 267,583,475.58/14,143.60
  6. Step 6: Final answer
    x = 18,919.05

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Similar ratio
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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.