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Finding the Fourth Proportional to 35,959.90, 53,931.20 and 18,420.70

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Solution

The fourth proportional to 35,959.90, 53,931.20 and 18,420.70 is: 27,626.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,959.90 : 53,931.20 = 18,420.70 : x
  2. Step 2: Convert to fraction form
    35,959.90/53,931.20 = 18,420.70/x
  3. Step 3: Cross multiply
    35,959.90x = 53,931.20 × 18,420.70
  4. Step 4: Simplify right side
    35,959.90x = 993,450,455.84
  5. Step 5: Solve for x
    x = 993,450,455.84/35,959.90
  6. Step 6: Final answer
    x = 27,626.62

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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.