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Finding the Fourth Proportional to 19,239.72, 28,859.60 and 10,491.72

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Solution

The fourth proportional to 19,239.72, 28,859.60 and 10,491.72 is: 15,737.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,239.72 : 28,859.60 = 10,491.72 : x
  2. Step 2: Convert to fraction form
    19,239.72/28,859.60 = 10,491.72/x
  3. Step 3: Cross multiply
    19,239.72x = 28,859.60 × 10,491.72
  4. Step 4: Simplify right side
    19,239.72x = 302,786,842.51
  5. Step 5: Solve for x
    x = 302,786,842.51/19,239.72
  6. Step 6: Final answer
    x = 15,737.59

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1.5x scale

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.