Home / 13,578.24-18,630.40-13,345.28

Finding the Fourth Proportional to 13,578.24, 18,630.40 and 13,345.28

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Solution

The fourth proportional to 13,578.24, 18,630.40 and 13,345.28 is: 18,310.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.24 : 18,630.40 = 13,345.28 : x
  2. Step 2: Convert to fraction form
    13,578.24/18,630.40 = 13,345.28/x
  3. Step 3: Cross multiply
    13,578.24x = 18,630.40 × 13,345.28
  4. Step 4: Simplify right side
    13,578.24x = 248,627,904.51
  5. Step 5: Solve for x
    x = 248,627,904.51/13,578.24
  6. Step 6: Final answer
    x = 18,310.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.