Home / 15,399.23-21,247.30-9,349.32

Finding the Fourth Proportional to 15,399.23, 21,247.30 and 9,349.32

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Solution

The fourth proportional to 15,399.23, 21,247.30 and 9,349.32 is: 12,899.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.23 : 21,247.30 = 9,349.32 : x
  2. Step 2: Convert to fraction form
    15,399.23/21,247.30 = 9,349.32/x
  3. Step 3: Cross multiply
    15,399.23x = 21,247.30 × 9,349.32
  4. Step 4: Simplify right side
    15,399.23x = 198,647,783.46
  5. Step 5: Solve for x
    x = 198,647,783.46/15,399.23
  6. Step 6: Final answer
    x = 12,899.85

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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.