Home / 13,511.21-18,645.47-7,543.07

Finding the Fourth Proportional to 13,511.21, 18,645.47 and 7,543.07

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Solution

The fourth proportional to 13,511.21, 18,645.47 and 7,543.07 is: 10,409.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.21 : 18,645.47 = 7,543.07 : x
  2. Step 2: Convert to fraction form
    13,511.21/18,645.47 = 7,543.07/x
  3. Step 3: Cross multiply
    13,511.21x = 18,645.47 × 7,543.07
  4. Step 4: Simplify right side
    13,511.21x = 140,644,199.97
  5. Step 5: Solve for x
    x = 140,644,199.97/13,511.21
  6. Step 6: Final answer
    x = 10,409.45

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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.