Home / 13,969.42-19,278.09-7,681.78

Finding the Fourth Proportional to 13,969.42, 19,278.09 and 7,681.78

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Solution

The fourth proportional to 13,969.42, 19,278.09 and 7,681.78 is: 10,601.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.42 : 19,278.09 = 7,681.78 : x
  2. Step 2: Convert to fraction form
    13,969.42/19,278.09 = 7,681.78/x
  3. Step 3: Cross multiply
    13,969.42x = 19,278.09 × 7,681.78
  4. Step 4: Simplify right side
    13,969.42x = 148,090,046.20
  5. Step 5: Solve for x
    x = 148,090,046.20/13,969.42
  6. Step 6: Final answer
    x = 10,601.02

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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.