Home / 13,979.70-19,285.63-8,311.23

Finding the Fourth Proportional to 13,979.70, 19,285.63 and 8,311.23

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Solution

The fourth proportional to 13,979.70, 19,285.63 and 8,311.23 is: 11,465.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.70 : 19,285.63 = 8,311.23 : x
  2. Step 2: Convert to fraction form
    13,979.70/19,285.63 = 8,311.23/x
  3. Step 3: Cross multiply
    13,979.70x = 19,285.63 × 8,311.23
  4. Step 4: Simplify right side
    13,979.70x = 160,287,285.85
  5. Step 5: Solve for x
    x = 160,287,285.85/13,979.70
  6. Step 6: Final answer
    x = 11,465.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.