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Finding the Fourth Proportional to 19,303.71, 28,899.23 and 11,885.91

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Solution

The fourth proportional to 19,303.71, 28,899.23 and 11,885.91 is: 17,794.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,303.71 : 28,899.23 = 11,885.91 : x
  2. Step 2: Convert to fraction form
    19,303.71/28,899.23 = 11,885.91/x
  3. Step 3: Cross multiply
    19,303.71x = 28,899.23 × 11,885.91
  4. Step 4: Simplify right side
    19,303.71x = 343,493,587.42
  5. Step 5: Solve for x
    x = 343,493,587.42/19,303.71
  6. Step 6: Final answer
    x = 17,794.17

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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.