Home / 13,699.10-18,904.38-7,730.42

Finding the Fourth Proportional to 13,699.10, 18,904.38 and 7,730.42

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Solution

The fourth proportional to 13,699.10, 18,904.38 and 7,730.42 is: 10,667.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.10 : 18,904.38 = 7,730.42 : x
  2. Step 2: Convert to fraction form
    13,699.10/18,904.38 = 7,730.42/x
  3. Step 3: Cross multiply
    13,699.10x = 18,904.38 × 7,730.42
  4. Step 4: Simplify right side
    13,699.10x = 146,138,797.24
  5. Step 5: Solve for x
    x = 146,138,797.24/13,699.10
  6. Step 6: Final answer
    x = 10,667.77

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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.