Home / 15,403.93-21,257.43-8,689.54

Finding the Fourth Proportional to 15,403.93, 21,257.43 and 8,689.54

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Solution

The fourth proportional to 15,403.93, 21,257.43 and 8,689.54 is: 11,991.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.93 : 21,257.43 = 8,689.54 : x
  2. Step 2: Convert to fraction form
    15,403.93/21,257.43 = 8,689.54/x
  3. Step 3: Cross multiply
    15,403.93x = 21,257.43 × 8,689.54
  4. Step 4: Simplify right side
    15,403.93x = 184,717,288.28
  5. Step 5: Solve for x
    x = 184,717,288.28/15,403.93
  6. Step 6: Final answer
    x = 11,991.57

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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.