Home / 15,531.35-21,433.32-8,457.75

Finding the Fourth Proportional to 15,531.35, 21,433.32 and 8,457.75

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Solution

The fourth proportional to 15,531.35, 21,433.32 and 8,457.75 is: 11,671.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.35 : 21,433.32 = 8,457.75 : x
  2. Step 2: Convert to fraction form
    15,531.35/21,433.32 = 8,457.75/x
  3. Step 3: Cross multiply
    15,531.35x = 21,433.32 × 8,457.75
  4. Step 4: Simplify right side
    15,531.35x = 181,277,662.23
  5. Step 5: Solve for x
    x = 181,277,662.23/15,531.35
  6. Step 6: Final answer
    x = 11,671.73

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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.