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Finding the Fourth Proportional to 35,417.80, 53,129.90 and 9,122.60

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Solution

The fourth proportional to 35,417.80, 53,129.90 and 9,122.60 is: 13,684.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,417.80 : 53,129.90 = 9,122.60 : x
  2. Step 2: Convert to fraction form
    35,417.80/53,129.90 = 9,122.60/x
  3. Step 3: Cross multiply
    35,417.80x = 53,129.90 × 9,122.60
  4. Step 4: Simplify right side
    35,417.80x = 484,682,825.74
  5. Step 5: Solve for x
    x = 484,682,825.74/35,417.80
  6. Step 6: Final answer
    x = 13,684.72

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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.