Home / 7,619.89-10,509.80-5,379.43

Finding the Fourth Proportional to 7,619.89, 10,509.80 and 5,379.43

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Solution

The fourth proportional to 7,619.89, 10,509.80 and 5,379.43 is: 7,419.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,619.89 : 10,509.80 = 5,379.43 : x
  2. Step 2: Convert to fraction form
    7,619.89/10,509.80 = 5,379.43/x
  3. Step 3: Cross multiply
    7,619.89x = 10,509.80 × 5,379.43
  4. Step 4: Simplify right side
    7,619.89x = 56,536,680.24
  5. Step 5: Solve for x
    x = 56,536,680.24/7,619.89
  6. Step 6: Final answer
    x = 7,419.62

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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.