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Finding the Fourth Proportional to 10,890.87, 15,033.99 and 7,358.86

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Solution

The fourth proportional to 10,890.87, 15,033.99 and 7,358.86 is: 10,158.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.87 : 15,033.99 = 7,358.86 : x
  2. Step 2: Convert to fraction form
    10,890.87/15,033.99 = 7,358.86/x
  3. Step 3: Cross multiply
    10,890.87x = 15,033.99 × 7,358.86
  4. Step 4: Simplify right side
    10,890.87x = 110,633,027.65
  5. Step 5: Solve for x
    x = 110,633,027.65/10,890.87
  6. Step 6: Final answer
    x = 10,158.33

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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.