Home / 15,478.08-21,359.45-9,105.36

Finding the Fourth Proportional to 15,478.08, 21,359.45 and 9,105.36

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Solution

The fourth proportional to 15,478.08, 21,359.45 and 9,105.36 is: 12,565.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.08 : 21,359.45 = 9,105.36 : x
  2. Step 2: Convert to fraction form
    15,478.08/21,359.45 = 9,105.36/x
  3. Step 3: Cross multiply
    15,478.08x = 21,359.45 × 9,105.36
  4. Step 4: Simplify right side
    15,478.08x = 194,485,481.65
  5. Step 5: Solve for x
    x = 194,485,481.65/15,478.08
  6. Step 6: Final answer
    x = 12,565.22

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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.