Home / 15,812.39-21,820.22-8,738.36

Finding the Fourth Proportional to 15,812.39, 21,820.22 and 8,738.36

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Solution

The fourth proportional to 15,812.39, 21,820.22 and 8,738.36 is: 12,058.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.39 : 21,820.22 = 8,738.36 : x
  2. Step 2: Convert to fraction form
    15,812.39/21,820.22 = 8,738.36/x
  3. Step 3: Cross multiply
    15,812.39x = 21,820.22 × 8,738.36
  4. Step 4: Simplify right side
    15,812.39x = 190,672,784.85
  5. Step 5: Solve for x
    x = 190,672,784.85/15,812.39
  6. Step 6: Final answer
    x = 12,058.45

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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.