Home / 13,511.41-18,637.49-12,561.28

Finding the Fourth Proportional to 13,511.41, 18,637.49 and 12,561.28

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Solution

The fourth proportional to 13,511.41, 18,637.49 and 12,561.28 is: 17,326.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.41 : 18,637.49 = 12,561.28 : x
  2. Step 2: Convert to fraction form
    13,511.41/18,637.49 = 12,561.28/x
  3. Step 3: Cross multiply
    13,511.41x = 18,637.49 × 12,561.28
  4. Step 4: Simplify right side
    13,511.41x = 234,110,715.20
  5. Step 5: Solve for x
    x = 234,110,715.20/13,511.41
  6. Step 6: Final answer
    x = 17,326.89

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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.