Home / 13,519.79-18,655.94-7,777.08

Finding the Fourth Proportional to 13,519.79, 18,655.94 and 7,777.08

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Solution

The fourth proportional to 13,519.79, 18,655.94 and 7,777.08 is: 10,731.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,519.79 : 18,655.94 = 7,777.08 : x
  2. Step 2: Convert to fraction form
    13,519.79/18,655.94 = 7,777.08/x
  3. Step 3: Cross multiply
    13,519.79x = 18,655.94 × 7,777.08
  4. Step 4: Simplify right side
    13,519.79x = 145,088,698.97
  5. Step 5: Solve for x
    x = 145,088,698.97/13,519.79
  6. Step 6: Final answer
    x = 10,731.58

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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.