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Finding the Fourth Proportional to 21,050.87, 29,050.91 and 11,491.32

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Solution

The fourth proportional to 21,050.87, 29,050.91 and 11,491.32 is: 15,858.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,050.87 : 29,050.91 = 11,491.32 : x
  2. Step 2: Convert to fraction form
    21,050.87/29,050.91 = 11,491.32/x
  3. Step 3: Cross multiply
    21,050.87x = 29,050.91 × 11,491.32
  4. Step 4: Simplify right side
    21,050.87x = 333,833,397.68
  5. Step 5: Solve for x
    x = 333,833,397.68/21,050.87
  6. Step 6: Final answer
    x = 15,858.41

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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.