Home / 13,220.25-18,243.95-7,631.25

Finding the Fourth Proportional to 13,220.25, 18,243.95 and 7,631.25

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Solution

The fourth proportional to 13,220.25, 18,243.95 and 7,631.25 is: 10,531.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.25 : 18,243.95 = 7,631.25 : x
  2. Step 2: Convert to fraction form
    13,220.25/18,243.95 = 7,631.25/x
  3. Step 3: Cross multiply
    13,220.25x = 18,243.95 × 7,631.25
  4. Step 4: Simplify right side
    13,220.25x = 139,224,105.28
  5. Step 5: Solve for x
    x = 139,224,105.28/13,220.25
  6. Step 6: Final answer
    x = 10,531.13

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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.