Home / 15,713.98-21,684.73-8,640.35

Finding the Fourth Proportional to 15,713.98, 21,684.73 and 8,640.35

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Solution

The fourth proportional to 15,713.98, 21,684.73 and 8,640.35 is: 11,923.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.98 : 21,684.73 = 8,640.35 : x
  2. Step 2: Convert to fraction form
    15,713.98/21,684.73 = 8,640.35/x
  3. Step 3: Cross multiply
    15,713.98x = 21,684.73 × 8,640.35
  4. Step 4: Simplify right side
    15,713.98x = 187,363,656.86
  5. Step 5: Solve for x
    x = 187,363,656.86/15,713.98
  6. Step 6: Final answer
    x = 11,923.37

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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.