Home / 13,200.55-18,212.21-7,531.21

Finding the Fourth Proportional to 13,200.55, 18,212.21 and 7,531.21

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Solution

The fourth proportional to 13,200.55, 18,212.21 and 7,531.21 is: 10,390.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.55 : 18,212.21 = 7,531.21 : x
  2. Step 2: Convert to fraction form
    13,200.55/18,212.21 = 7,531.21/x
  3. Step 3: Cross multiply
    13,200.55x = 18,212.21 × 7,531.21
  4. Step 4: Simplify right side
    13,200.55x = 137,159,978.07
  5. Step 5: Solve for x
    x = 137,159,978.07/13,200.55
  6. Step 6: Final answer
    x = 10,390.47

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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.