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Finding the Fourth Proportional to 43,281.40, 64,946.40 and 18,317.20

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Solution

The fourth proportional to 43,281.40, 64,946.40 and 18,317.20 is: 27,486.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,281.40 : 64,946.40 = 18,317.20 : x
  2. Step 2: Convert to fraction form
    43,281.40/64,946.40 = 18,317.20/x
  3. Step 3: Cross multiply
    43,281.40x = 64,946.40 × 18,317.20
  4. Step 4: Simplify right side
    43,281.40x = 1,189,636,198.08
  5. Step 5: Solve for x
    x = 1,189,636,198.08/43,281.40
  6. Step 6: Final answer
    x = 27,486.08

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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.