Home / 15,225.64-21,009.42-8,511.64

Finding the Fourth Proportional to 15,225.64, 21,009.42 and 8,511.64

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Solution

The fourth proportional to 15,225.64, 21,009.42 and 8,511.64 is: 11,744.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,225.64 : 21,009.42 = 8,511.64 : x
  2. Step 2: Convert to fraction form
    15,225.64/21,009.42 = 8,511.64/x
  3. Step 3: Cross multiply
    15,225.64x = 21,009.42 × 8,511.64
  4. Step 4: Simplify right side
    15,225.64x = 178,824,619.65
  5. Step 5: Solve for x
    x = 178,824,619.65/15,225.64
  6. Step 6: Final answer
    x = 11,744.97

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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.