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Finding the Fourth Proportional to 28,004.38, 42,009 and 10,239.91

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Solution

The fourth proportional to 28,004.38, 42,009 and 10,239.91 is: 15,360.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.38 : 42,009 = 10,239.91 : x
  2. Step 2: Convert to fraction form
    28,004.38/42,009 = 10,239.91/x
  3. Step 3: Cross multiply
    28,004.38x = 42,009 × 10,239.91
  4. Step 4: Simplify right side
    28,004.38x = 430,168,379.19
  5. Step 5: Solve for x
    x = 430,168,379.19/28,004.38
  6. Step 6: Final answer
    x = 15,360.75

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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.