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Finding the Fourth Proportional to 15,619.65, 21,555.09 and 8,546.06

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Solution

The fourth proportional to 15,619.65, 21,555.09 and 8,546.06 is: 11,793.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,619.65 : 21,555.09 = 8,546.06 : x
  2. Step 2: Convert to fraction form
    15,619.65/21,555.09 = 8,546.06/x
  3. Step 3: Cross multiply
    15,619.65x = 21,555.09 × 8,546.06
  4. Step 4: Simplify right side
    15,619.65x = 184,210,984.67
  5. Step 5: Solve for x
    x = 184,210,984.67/15,619.65
  6. Step 6: Final answer
    x = 11,793.54

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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.