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Finding the Fourth Proportional to 14,237.80, 19,639 and 8,648.80

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Solution

The fourth proportional to 14,237.80, 19,639 and 8,648.80 is: 11,929.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,237.80 : 19,639 = 8,648.80 : x
  2. Step 2: Convert to fraction form
    14,237.80/19,639 = 8,648.80/x
  3. Step 3: Cross multiply
    14,237.80x = 19,639 × 8,648.80
  4. Step 4: Simplify right side
    14,237.80x = 169,853,783.20
  5. Step 5: Solve for x
    x = 169,853,783.20/14,237.80
  6. Step 6: Final answer
    x = 11,929.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.