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Finding the Fourth Proportional to 19,706.99, 29,529.59 and 11,390.91

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Solution

The fourth proportional to 19,706.99, 29,529.59 and 11,390.91 is: 17,068.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,706.99 : 29,529.59 = 11,390.91 : x
  2. Step 2: Convert to fraction form
    19,706.99/29,529.59 = 11,390.91/x
  3. Step 3: Cross multiply
    19,706.99x = 29,529.59 × 11,390.91
  4. Step 4: Simplify right side
    19,706.99x = 336,368,845.07
  5. Step 5: Solve for x
    x = 336,368,845.07/19,706.99
  6. Step 6: Final answer
    x = 17,068.51

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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.