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Finding the Fourth Proportional to 43,602.90, 65,411.21 and 18,643.08

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Solution

The fourth proportional to 43,602.90, 65,411.21 and 18,643.08 is: 27,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,602.90 : 65,411.21 = 18,643.08 : x
  2. Step 2: Convert to fraction form
    43,602.90/65,411.21 = 18,643.08/x
  3. Step 3: Cross multiply
    43,602.90x = 65,411.21 × 18,643.08
  4. Step 4: Simplify right side
    43,602.90x = 1,219,466,420.93
  5. Step 5: Solve for x
    x = 1,219,466,420.93/43,602.90
  6. Step 6: Final answer
    x = 27,967.55

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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.