Home / 13,213.89-18,235.14-7,628.13

Finding the Fourth Proportional to 13,213.89, 18,235.14 and 7,628.13

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Solution

The fourth proportional to 13,213.89, 18,235.14 and 7,628.13 is: 10,526.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.89 : 18,235.14 = 7,628.13 : x
  2. Step 2: Convert to fraction form
    13,213.89/18,235.14 = 7,628.13/x
  3. Step 3: Cross multiply
    13,213.89x = 18,235.14 × 7,628.13
  4. Step 4: Simplify right side
    13,213.89x = 139,100,018.49
  5. Step 5: Solve for x
    x = 139,100,018.49/13,213.89
  6. Step 6: Final answer
    x = 10,526.80

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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.