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Finding the Fourth Proportional to 13,107.80, 18,085.94 and 7,801.58

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Solution

The fourth proportional to 13,107.80, 18,085.94 and 7,801.58 is: 10,764.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.80 : 18,085.94 = 7,801.58 : x
  2. Step 2: Convert to fraction form
    13,107.80/18,085.94 = 7,801.58/x
  3. Step 3: Cross multiply
    13,107.80x = 18,085.94 × 7,801.58
  4. Step 4: Simplify right side
    13,107.80x = 141,098,907.79
  5. Step 5: Solve for x
    x = 141,098,907.79/13,107.80
  6. Step 6: Final answer
    x = 10,764.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.