Home / 10,979.58-15,147.99-7,621.50

Finding the Fourth Proportional to 10,979.58, 15,147.99 and 7,621.50

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Solution

The fourth proportional to 10,979.58, 15,147.99 and 7,621.50 is: 10,515.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.58 : 15,147.99 = 7,621.50 : x
  2. Step 2: Convert to fraction form
    10,979.58/15,147.99 = 7,621.50/x
  3. Step 3: Cross multiply
    10,979.58x = 15,147.99 × 7,621.50
  4. Step 4: Simplify right side
    10,979.58x = 115,450,405.79
  5. Step 5: Solve for x
    x = 115,450,405.79/10,979.58
  6. Step 6: Final answer
    x = 10,515.01

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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.