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Finding the Fourth Proportional to 43,661.76, 65,437.80 and 18,672.40

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Solution

The fourth proportional to 43,661.76, 65,437.80 and 18,672.40 is: 27,985.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,661.76 : 65,437.80 = 18,672.40 : x
  2. Step 2: Convert to fraction form
    43,661.76/65,437.80 = 18,672.40/x
  3. Step 3: Cross multiply
    43,661.76x = 65,437.80 × 18,672.40
  4. Step 4: Simplify right side
    43,661.76x = 1,221,880,776.72
  5. Step 5: Solve for x
    x = 1,221,880,776.72/43,661.76
  6. Step 6: Final answer
    x = 27,985.15

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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.