Home / 13,776.45-19,011.68-8,111.21

Finding the Fourth Proportional to 13,776.45, 19,011.68 and 8,111.21

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Solution

The fourth proportional to 13,776.45, 19,011.68 and 8,111.21 is: 11,193.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,776.45 : 19,011.68 = 8,111.21 : x
  2. Step 2: Convert to fraction form
    13,776.45/19,011.68 = 8,111.21/x
  3. Step 3: Cross multiply
    13,776.45x = 19,011.68 × 8,111.21
  4. Step 4: Simplify right side
    13,776.45x = 154,207,593.32
  5. Step 5: Solve for x
    x = 154,207,593.32/13,776.45
  6. Step 6: Final answer
    x = 11,193.57

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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.