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Finding the Fourth Proportional to 13,758.69, 18,987.03 and 7,470.93

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Solution

The fourth proportional to 13,758.69, 18,987.03 and 7,470.93 is: 10,309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.69 : 18,987.03 = 7,470.93 : x
  2. Step 2: Convert to fraction form
    13,758.69/18,987.03 = 7,470.93/x
  3. Step 3: Cross multiply
    13,758.69x = 18,987.03 × 7,470.93
  4. Step 4: Simplify right side
    13,758.69x = 141,850,772.04
  5. Step 5: Solve for x
    x = 141,850,772.04/13,758.69
  6. Step 6: Final answer
    x = 10,309.90

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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.