Home / 11,256.88-16,821.20-8,427.40

Finding the Fourth Proportional to 11,256.88, 16,821.20 and 8,427.40

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Solution

The fourth proportional to 11,256.88, 16,821.20 and 8,427.40 is: 12,593.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,256.88 : 16,821.20 = 8,427.40 : x
  2. Step 2: Convert to fraction form
    11,256.88/16,821.20 = 8,427.40/x
  3. Step 3: Cross multiply
    11,256.88x = 16,821.20 × 8,427.40
  4. Step 4: Simplify right side
    11,256.88x = 141,758,980.88
  5. Step 5: Solve for x
    x = 141,758,980.88/11,256.88
  6. Step 6: Final answer
    x = 12,593.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.