Home / 13,133.80-19,682.70-8,439.40

Finding the Fourth Proportional to 13,133.80, 19,682.70 and 8,439.40

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Solution

The fourth proportional to 13,133.80, 19,682.70 and 8,439.40 is: 12,647.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,133.80 : 19,682.70 = 8,439.40 : x
  2. Step 2: Convert to fraction form
    13,133.80/19,682.70 = 8,439.40/x
  3. Step 3: Cross multiply
    13,133.80x = 19,682.70 × 8,439.40
  4. Step 4: Simplify right side
    13,133.80x = 166,110,178.38
  5. Step 5: Solve for x
    x = 166,110,178.38/13,133.80
  6. Step 6: Final answer
    x = 12,647.53

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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.