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Finding the Fourth Proportional to 18,976.94, 28,465.41 and 5,125.94

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Solution

The fourth proportional to 18,976.94, 28,465.41 and 5,125.94 is: 7,688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.94 : 28,465.41 = 5,125.94 : x
  2. Step 2: Convert to fraction form
    18,976.94/28,465.41 = 5,125.94/x
  3. Step 3: Cross multiply
    18,976.94x = 28,465.41 × 5,125.94
  4. Step 4: Simplify right side
    18,976.94x = 145,911,983.74
  5. Step 5: Solve for x
    x = 145,911,983.74/18,976.94
  6. Step 6: Final answer
    x = 7,688.91

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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.