Home / 19,991.84-29,986.32-8,895.20

Finding the Fourth Proportional to 19,991.84, 29,986.32 and 8,895.20

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Solution

The fourth proportional to 19,991.84, 29,986.32 and 8,895.20 is: 13,342.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.84 : 29,986.32 = 8,895.20 : x
  2. Step 2: Convert to fraction form
    19,991.84/29,986.32 = 8,895.20/x
  3. Step 3: Cross multiply
    19,991.84x = 29,986.32 × 8,895.20
  4. Step 4: Simplify right side
    19,991.84x = 266,734,313.66
  5. Step 5: Solve for x
    x = 266,734,313.66/19,991.84
  6. Step 6: Final answer
    x = 13,342.16

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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.