Home / 14,206.40-21,290.40-12,555.20

Finding the Fourth Proportional to 14,206.40, 21,290.40 and 12,555.20

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Solution

The fourth proportional to 14,206.40, 21,290.40 and 12,555.20 is: 18,815.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,206.40 : 21,290.40 = 12,555.20 : x
  2. Step 2: Convert to fraction form
    14,206.40/21,290.40 = 12,555.20/x
  3. Step 3: Cross multiply
    14,206.40x = 21,290.40 × 12,555.20
  4. Step 4: Simplify right side
    14,206.40x = 267,305,230.08
  5. Step 5: Solve for x
    x = 267,305,230.08/14,206.40
  6. Step 6: Final answer
    x = 18,815.83

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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.