Home / 9,405.99-12,979.58-5,156.37

Finding the Fourth Proportional to 9,405.99, 12,979.58 and 5,156.37

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Solution

The fourth proportional to 9,405.99, 12,979.58 and 5,156.37 is: 7,115.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.99 : 12,979.58 = 5,156.37 : x
  2. Step 2: Convert to fraction form
    9,405.99/12,979.58 = 5,156.37/x
  3. Step 3: Cross multiply
    9,405.99x = 12,979.58 × 5,156.37
  4. Step 4: Simplify right side
    9,405.99x = 66,927,491.14
  5. Step 5: Solve for x
    x = 66,927,491.14/9,405.99
  6. Step 6: Final answer
    x = 7,115.41

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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.