Home / 13,708.69-18,917.84-7,740.61

Finding the Fourth Proportional to 13,708.69, 18,917.84 and 7,740.61

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Solution

The fourth proportional to 13,708.69, 18,917.84 and 7,740.61 is: 10,681.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.69 : 18,917.84 = 7,740.61 : x
  2. Step 2: Convert to fraction form
    13,708.69/18,917.84 = 7,740.61/x
  3. Step 3: Cross multiply
    13,708.69x = 18,917.84 × 7,740.61
  4. Step 4: Simplify right side
    13,708.69x = 146,435,621.48
  5. Step 5: Solve for x
    x = 146,435,621.48/13,708.69
  6. Step 6: Final answer
    x = 10,681.96

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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.