Home / 15,625.78-21,563.15-8,911.25

Finding the Fourth Proportional to 15,625.78, 21,563.15 and 8,911.25

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Solution

The fourth proportional to 15,625.78, 21,563.15 and 8,911.25 is: 12,297.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,625.78 : 21,563.15 = 8,911.25 : x
  2. Step 2: Convert to fraction form
    15,625.78/21,563.15 = 8,911.25/x
  3. Step 3: Cross multiply
    15,625.78x = 21,563.15 × 8,911.25
  4. Step 4: Simplify right side
    15,625.78x = 192,154,629.79
  5. Step 5: Solve for x
    x = 192,154,629.79/15,625.78
  6. Step 6: Final answer
    x = 12,297.28

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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.