Home / 12,640.06-18,937.39-7,443.10

Finding the Fourth Proportional to 12,640.06, 18,937.39 and 7,443.10

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Solution

The fourth proportional to 12,640.06, 18,937.39 and 7,443.10 is: 11,151.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.06 : 18,937.39 = 7,443.10 : x
  2. Step 2: Convert to fraction form
    12,640.06/18,937.39 = 7,443.10/x
  3. Step 3: Cross multiply
    12,640.06x = 18,937.39 × 7,443.10
  4. Step 4: Simplify right side
    12,640.06x = 140,952,887.51
  5. Step 5: Solve for x
    x = 140,952,887.51/12,640.06
  6. Step 6: Final answer
    x = 11,151.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.