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Finding the Fourth Proportional to 28,898.72, 39,913.14 and 19,450.88

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Solution

The fourth proportional to 28,898.72, 39,913.14 and 19,450.88 is: 26,864.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,898.72 : 39,913.14 = 19,450.88 : x
  2. Step 2: Convert to fraction form
    28,898.72/39,913.14 = 19,450.88/x
  3. Step 3: Cross multiply
    28,898.72x = 39,913.14 × 19,450.88
  4. Step 4: Simplify right side
    28,898.72x = 776,345,696.56
  5. Step 5: Solve for x
    x = 776,345,696.56/28,898.72
  6. Step 6: Final answer
    x = 26,864.36

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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.