Home / 13,999.10-19,318.75-7,711.47

Finding the Fourth Proportional to 13,999.10, 19,318.75 and 7,711.47

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Solution

The fourth proportional to 13,999.10, 19,318.75 and 7,711.47 is: 10,641.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.10 : 19,318.75 = 7,711.47 : x
  2. Step 2: Convert to fraction form
    13,999.10/19,318.75 = 7,711.47/x
  3. Step 3: Cross multiply
    13,999.10x = 19,318.75 × 7,711.47
  4. Step 4: Simplify right side
    13,999.10x = 148,975,961.06
  5. Step 5: Solve for x
    x = 148,975,961.06/13,999.10
  6. Step 6: Final answer
    x = 10,641.83

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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.