Home / 14,135.80-21,189.30-8,289.40

Finding the Fourth Proportional to 14,135.80, 21,189.30 and 8,289.40

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Solution

The fourth proportional to 14,135.80, 21,189.30 and 8,289.40 is: 12,425.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,135.80 : 21,189.30 = 8,289.40 : x
  2. Step 2: Convert to fraction form
    14,135.80/21,189.30 = 8,289.40/x
  3. Step 3: Cross multiply
    14,135.80x = 21,189.30 × 8,289.40
  4. Step 4: Simplify right side
    14,135.80x = 175,646,583.42
  5. Step 5: Solve for x
    x = 175,646,583.42/14,135.80
  6. Step 6: Final answer
    x = 12,425.66

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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.