Home / 13,355.06-18,432.24-7,978.28

Finding the Fourth Proportional to 13,355.06, 18,432.24 and 7,978.28

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Solution

The fourth proportional to 13,355.06, 18,432.24 and 7,978.28 is: 11,011.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.06 : 18,432.24 = 7,978.28 : x
  2. Step 2: Convert to fraction form
    13,355.06/18,432.24 = 7,978.28/x
  3. Step 3: Cross multiply
    13,355.06x = 18,432.24 × 7,978.28
  4. Step 4: Simplify right side
    13,355.06x = 147,057,571.75
  5. Step 5: Solve for x
    x = 147,057,571.75/13,355.06
  6. Step 6: Final answer
    x = 11,011.37

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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.