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Finding the Fourth Proportional to 19,313.98, 28,965.38 and 8,778.13

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Solution

The fourth proportional to 19,313.98, 28,965.38 and 8,778.13 is: 13,164.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,313.98 : 28,965.38 = 8,778.13 : x
  2. Step 2: Convert to fraction form
    19,313.98/28,965.38 = 8,778.13/x
  3. Step 3: Cross multiply
    19,313.98x = 28,965.38 × 8,778.13
  4. Step 4: Simplify right side
    19,313.98x = 254,261,726.31
  5. Step 5: Solve for x
    x = 254,261,726.31/19,313.98
  6. Step 6: Final answer
    x = 13,164.65

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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.