Home / 15,543.82-21,450.18-8,470.09

Finding the Fourth Proportional to 15,543.82, 21,450.18 and 8,470.09

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Solution

The fourth proportional to 15,543.82, 21,450.18 and 8,470.09 is: 11,688.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.82 : 21,450.18 = 8,470.09 : x
  2. Step 2: Convert to fraction form
    15,543.82/21,450.18 = 8,470.09/x
  3. Step 3: Cross multiply
    15,543.82x = 21,450.18 × 8,470.09
  4. Step 4: Simplify right side
    15,543.82x = 181,684,955.12
  5. Step 5: Solve for x
    x = 181,684,955.12/15,543.82
  6. Step 6: Final answer
    x = 11,688.57

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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.