Home / 15,512.85-21,407.90-8,439.26

Finding the Fourth Proportional to 15,512.85, 21,407.90 and 8,439.26

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Solution

The fourth proportional to 15,512.85, 21,407.90 and 8,439.26 is: 11,646.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.85 : 21,407.90 = 8,439.26 : x
  2. Step 2: Convert to fraction form
    15,512.85/21,407.90 = 8,439.26/x
  3. Step 3: Cross multiply
    15,512.85x = 21,407.90 × 8,439.26
  4. Step 4: Simplify right side
    15,512.85x = 180,666,684.92
  5. Step 5: Solve for x
    x = 180,666,684.92/15,512.85
  6. Step 6: Final answer
    x = 11,646.26

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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.