Home / 13,289.84-18,339.38-7,620.54

Finding the Fourth Proportional to 13,289.84, 18,339.38 and 7,620.54

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Solution

The fourth proportional to 13,289.84, 18,339.38 and 7,620.54 is: 10,516.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.84 : 18,339.38 = 7,620.54 : x
  2. Step 2: Convert to fraction form
    13,289.84/18,339.38 = 7,620.54/x
  3. Step 3: Cross multiply
    13,289.84x = 18,339.38 × 7,620.54
  4. Step 4: Simplify right side
    13,289.84x = 139,755,978.87
  5. Step 5: Solve for x
    x = 139,755,978.87/13,289.84
  6. Step 6: Final answer
    x = 10,516.00

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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.