Home / 13,145.36-18,140.57-8,429.63

Finding the Fourth Proportional to 13,145.36, 18,140.57 and 8,429.63

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Solution

The fourth proportional to 13,145.36, 18,140.57 and 8,429.63 is: 11,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.36 : 18,140.57 = 8,429.63 : x
  2. Step 2: Convert to fraction form
    13,145.36/18,140.57 = 8,429.63/x
  3. Step 3: Cross multiply
    13,145.36x = 18,140.57 × 8,429.63
  4. Step 4: Simplify right side
    13,145.36x = 152,918,160.24
  5. Step 5: Solve for x
    x = 152,918,160.24/13,145.36
  6. Step 6: Final answer
    x = 11,632.87

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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.