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Finding the Fourth Proportional to 19,358.10, 29,037.15 and 19,212.30

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Solution

The fourth proportional to 19,358.10, 29,037.15 and 19,212.30 is: 28,818.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,358.10 : 29,037.15 = 19,212.30 : x
  2. Step 2: Convert to fraction form
    19,358.10/29,037.15 = 19,212.30/x
  3. Step 3: Cross multiply
    19,358.10x = 29,037.15 × 19,212.30
  4. Step 4: Simplify right side
    19,358.10x = 557,870,436.95
  5. Step 5: Solve for x
    x = 557,870,436.95/19,358.10
  6. Step 6: Final answer
    x = 28,818.45

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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.