Home / 18,638.80-25,720.98-10,255.28

Finding the Fourth Proportional to 18,638.80, 25,720.98 and 10,255.28

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Solution

The fourth proportional to 18,638.80, 25,720.98 and 10,255.28 is: 14,151.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.80 : 25,720.98 = 10,255.28 : x
  2. Step 2: Convert to fraction form
    18,638.80/25,720.98 = 10,255.28/x
  3. Step 3: Cross multiply
    18,638.80x = 25,720.98 × 10,255.28
  4. Step 4: Simplify right side
    18,638.80x = 263,775,851.77
  5. Step 5: Solve for x
    x = 263,775,851.77/18,638.80
  6. Step 6: Final answer
    x = 14,151.98

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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.