Home / 13,137.66-18,126.69-8,428.32

Finding the Fourth Proportional to 13,137.66, 18,126.69 and 8,428.32

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Solution

The fourth proportional to 13,137.66, 18,126.69 and 8,428.32 is: 11,628.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.66 : 18,126.69 = 8,428.32 : x
  2. Step 2: Convert to fraction form
    13,137.66/18,126.69 = 8,428.32/x
  3. Step 3: Cross multiply
    13,137.66x = 18,126.69 × 8,428.32
  4. Step 4: Simplify right side
    13,137.66x = 152,777,543.86
  5. Step 5: Solve for x
    x = 152,777,543.86/13,137.66
  6. Step 6: Final answer
    x = 11,628.98

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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.