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Finding the Fourth Proportional to 19,329.91, 28,994.88 and 5,288.90

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Solution

The fourth proportional to 19,329.91, 28,994.88 and 5,288.90 is: 7,933.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,329.91 : 28,994.88 = 5,288.90 : x
  2. Step 2: Convert to fraction form
    19,329.91/28,994.88 = 5,288.90/x
  3. Step 3: Cross multiply
    19,329.91x = 28,994.88 × 5,288.90
  4. Step 4: Simplify right side
    19,329.91x = 153,351,020.83
  5. Step 5: Solve for x
    x = 153,351,020.83/19,329.91
  6. Step 6: Final answer
    x = 7,933.35

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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.