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Finding the Fourth Proportional to 13,776.60, 19,011.60 and 7,488.96

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Solution

The fourth proportional to 13,776.60, 19,011.60 and 7,488.96 is: 10,334.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,776.60 : 19,011.60 = 7,488.96 : x
  2. Step 2: Convert to fraction form
    13,776.60/19,011.60 = 7,488.96/x
  3. Step 3: Cross multiply
    13,776.60x = 19,011.60 × 7,488.96
  4. Step 4: Simplify right side
    13,776.60x = 142,377,111.94
  5. Step 5: Solve for x
    x = 142,377,111.94/13,776.60
  6. Step 6: Final answer
    x = 10,334.71

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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.