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Finding the Fourth Proportional to 13,808.79, 19,055.45 and 7,839.65

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Solution

The fourth proportional to 13,808.79, 19,055.45 and 7,839.65 is: 10,818.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.79 : 19,055.45 = 7,839.65 : x
  2. Step 2: Convert to fraction form
    13,808.79/19,055.45 = 7,839.65/x
  3. Step 3: Cross multiply
    13,808.79x = 19,055.45 × 7,839.65
  4. Step 4: Simplify right side
    13,808.79x = 149,387,924.12
  5. Step 5: Solve for x
    x = 149,387,924.12/13,808.79
  6. Step 6: Final answer
    x = 10,818.32

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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.