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Finding the Fourth Proportional to 40,017.42, 59,978.19 and 18,641.32

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Solution

The fourth proportional to 40,017.42, 59,978.19 and 18,641.32 is: 27,939.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,017.42 : 59,978.19 = 18,641.32 : x
  2. Step 2: Convert to fraction form
    40,017.42/59,978.19 = 18,641.32/x
  3. Step 3: Cross multiply
    40,017.42x = 59,978.19 × 18,641.32
  4. Step 4: Simplify right side
    40,017.42x = 1,118,072,632.81
  5. Step 5: Solve for x
    x = 1,118,072,632.81/40,017.42
  6. Step 6: Final answer
    x = 27,939.65

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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.