Home / 15,494.23-21,382.20-8,420.65

Finding the Fourth Proportional to 15,494.23, 21,382.20 and 8,420.65

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Solution

The fourth proportional to 15,494.23, 21,382.20 and 8,420.65 is: 11,620.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.23 : 21,382.20 = 8,420.65 : x
  2. Step 2: Convert to fraction form
    15,494.23/21,382.20 = 8,420.65/x
  3. Step 3: Cross multiply
    15,494.23x = 21,382.20 × 8,420.65
  4. Step 4: Simplify right side
    15,494.23x = 180,052,075.89
  5. Step 5: Solve for x
    x = 180,052,075.89/15,494.23
  6. Step 6: Final answer
    x = 11,620.59

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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.