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Finding the Fourth Proportional to 13,903.25, 19,186.80 and 7,934.80

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Solution

The fourth proportional to 13,903.25, 19,186.80 and 7,934.80 is: 10,950.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.25 : 19,186.80 = 7,934.80 : x
  2. Step 2: Convert to fraction form
    13,903.25/19,186.80 = 7,934.80/x
  3. Step 3: Cross multiply
    13,903.25x = 19,186.80 × 7,934.80
  4. Step 4: Simplify right side
    13,903.25x = 152,243,420.64
  5. Step 5: Solve for x
    x = 152,243,420.64/13,903.25
  6. Step 6: Final answer
    x = 10,950.20

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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.