Home / 13,055.88-18,015.30-7,678.56

Finding the Fourth Proportional to 13,055.88, 18,015.30 and 7,678.56

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Solution

The fourth proportional to 13,055.88, 18,015.30 and 7,678.56 is: 10,595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.88 : 18,015.30 = 7,678.56 : x
  2. Step 2: Convert to fraction form
    13,055.88/18,015.30 = 7,678.56/x
  3. Step 3: Cross multiply
    13,055.88x = 18,015.30 × 7,678.56
  4. Step 4: Simplify right side
    13,055.88x = 138,331,561.97
  5. Step 5: Solve for x
    x = 138,331,561.97/13,055.88
  6. Step 6: Final answer
    x = 10,595.35

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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.