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Finding the Fourth Proportional to 18,810.17, 28,186.09 and 7,707.50

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Solution

The fourth proportional to 18,810.17, 28,186.09 and 7,707.50 is: 11,549.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.17 : 28,186.09 = 7,707.50 : x
  2. Step 2: Convert to fraction form
    18,810.17/28,186.09 = 7,707.50/x
  3. Step 3: Cross multiply
    18,810.17x = 28,186.09 × 7,707.50
  4. Step 4: Simplify right side
    18,810.17x = 217,244,128.48
  5. Step 5: Solve for x
    x = 217,244,128.48/18,810.17
  6. Step 6: Final answer
    x = 11,549.29

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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.