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Finding the Fourth Proportional to 18,741, 28,103.76 and 7,640.16

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Solution

The fourth proportional to 18,741, 28,103.76 and 7,640.16 is: 11,457.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,741 : 28,103.76 = 7,640.16 : x
  2. Step 2: Convert to fraction form
    18,741/28,103.76 = 7,640.16/x
  3. Step 3: Cross multiply
    18,741x = 28,103.76 × 7,640.16
  4. Step 4: Simplify right side
    18,741x = 214,717,223.00
  5. Step 5: Solve for x
    x = 214,717,223.00/18,741
  6. Step 6: Final answer
    x = 11,457.08

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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.