Home / 13,128.24-18,123.66-10,137.36

Finding the Fourth Proportional to 13,128.24, 18,123.66 and 10,137.36

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Solution

The fourth proportional to 13,128.24, 18,123.66 and 10,137.36 is: 13,994.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.24 : 18,123.66 = 10,137.36 : x
  2. Step 2: Convert to fraction form
    13,128.24/18,123.66 = 10,137.36/x
  3. Step 3: Cross multiply
    13,128.24x = 18,123.66 × 10,137.36
  4. Step 4: Simplify right side
    13,128.24x = 183,726,065.94
  5. Step 5: Solve for x
    x = 183,726,065.94/13,128.24
  6. Step 6: Final answer
    x = 13,994.72

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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.