Home / 13,410.09-18,508.50-8,631.63

Finding the Fourth Proportional to 13,410.09, 18,508.50 and 8,631.63

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Solution

The fourth proportional to 13,410.09, 18,508.50 and 8,631.63 is: 11,913.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.09 : 18,508.50 = 8,631.63 : x
  2. Step 2: Convert to fraction form
    13,410.09/18,508.50 = 8,631.63/x
  3. Step 3: Cross multiply
    13,410.09x = 18,508.50 × 8,631.63
  4. Step 4: Simplify right side
    13,410.09x = 159,758,523.86
  5. Step 5: Solve for x
    x = 159,758,523.86/13,410.09
  6. Step 6: Final answer
    x = 11,913.31

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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.