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Finding the Fourth Proportional to 18,999.10, 28,502.70 and 9,640.36

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Solution

The fourth proportional to 18,999.10, 28,502.70 and 9,640.36 is: 14,462.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.10 : 28,502.70 = 9,640.36 : x
  2. Step 2: Convert to fraction form
    18,999.10/28,502.70 = 9,640.36/x
  3. Step 3: Cross multiply
    18,999.10x = 28,502.70 × 9,640.36
  4. Step 4: Simplify right side
    18,999.10x = 274,776,288.97
  5. Step 5: Solve for x
    x = 274,776,288.97/18,999.10
  6. Step 6: Final answer
    x = 14,462.60

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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.