Home / 13,128.08-18,118.49-8,348.47

Finding the Fourth Proportional to 13,128.08, 18,118.49 and 8,348.47

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Solution

The fourth proportional to 13,128.08, 18,118.49 and 8,348.47 is: 11,521.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.08 : 18,118.49 = 8,348.47 : x
  2. Step 2: Convert to fraction form
    13,128.08/18,118.49 = 8,348.47/x
  3. Step 3: Cross multiply
    13,128.08x = 18,118.49 × 8,348.47
  4. Step 4: Simplify right side
    13,128.08x = 151,261,583.17
  5. Step 5: Solve for x
    x = 151,261,583.17/13,128.08
  6. Step 6: Final answer
    x = 11,521.99

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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.