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Finding the Fourth Proportional to 40,872, 61,308 and 11,688

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Solution

The fourth proportional to 40,872, 61,308 and 11,688 is: 17,532

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,872 : 61,308 = 11,688 : x
  2. Step 2: Convert to fraction form
    40,872/61,308 = 11,688/x
  3. Step 3: Cross multiply
    40,872x = 61,308 × 11,688
  4. Step 4: Simplify right side
    40,872x = 716,567,904
  5. Step 5: Solve for x
    x = 716,567,904/40,872
  6. Step 6: Final answer
    x = 17,532

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.