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Finding the Fourth Proportional to 19,298.65, 28,947.98 and 5,447.65

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Solution

The fourth proportional to 19,298.65, 28,947.98 and 5,447.65 is: 8,171.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,298.65 : 28,947.98 = 5,447.65 : x
  2. Step 2: Convert to fraction form
    19,298.65/28,947.98 = 5,447.65/x
  3. Step 3: Cross multiply
    19,298.65x = 28,947.98 × 5,447.65
  4. Step 4: Simplify right side
    19,298.65x = 157,698,463.25
  5. Step 5: Solve for x
    x = 157,698,463.25/19,298.65
  6. Step 6: Final answer
    x = 8,171.48

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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.