Home / 10,979.80-15,155.00-6,504.91

Finding the Fourth Proportional to 10,979.80, 15,155.00 and 6,504.91

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Solution

The fourth proportional to 10,979.80, 15,155.00 and 6,504.91 is: 8,978.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.80 : 15,155.00 = 6,504.91 : x
  2. Step 2: Convert to fraction form
    10,979.80/15,155.00 = 6,504.91/x
  3. Step 3: Cross multiply
    10,979.80x = 15,155.00 × 6,504.91
  4. Step 4: Simplify right side
    10,979.80x = 98,581,865.03
  5. Step 5: Solve for x
    x = 98,581,865.03/10,979.80
  6. Step 6: Final answer
    x = 8,978.47

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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.