Home / 13,678.24-18,955.26-13,415.76

Finding the Fourth Proportional to 13,678.24, 18,955.26 and 13,415.76

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Solution

The fourth proportional to 13,678.24, 18,955.26 and 13,415.76 is: 18,591.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.24 : 18,955.26 = 13,415.76 : x
  2. Step 2: Convert to fraction form
    13,678.24/18,955.26 = 13,415.76/x
  3. Step 3: Cross multiply
    13,678.24x = 18,955.26 × 13,415.76
  4. Step 4: Simplify right side
    13,678.24x = 254,299,218.90
  5. Step 5: Solve for x
    x = 254,299,218.90/13,678.24
  6. Step 6: Final answer
    x = 18,591.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.