Home / 15,403.35-21,257.16-8,689.26

Finding the Fourth Proportional to 15,403.35, 21,257.16 and 8,689.26

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Solution

The fourth proportional to 15,403.35, 21,257.16 and 8,689.26 is: 11,991.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.35 : 21,257.16 = 8,689.26 : x
  2. Step 2: Convert to fraction form
    15,403.35/21,257.16 = 8,689.26/x
  3. Step 3: Cross multiply
    15,403.35x = 21,257.16 × 8,689.26
  4. Step 4: Simplify right side
    15,403.35x = 184,708,990.10
  5. Step 5: Solve for x
    x = 184,708,990.10/15,403.35
  6. Step 6: Final answer
    x = 11,991.48

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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.