Home / 13,355.76-18,430.80-7,387.56

Finding the Fourth Proportional to 13,355.76, 18,430.80 and 7,387.56

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Solution

The fourth proportional to 13,355.76, 18,430.80 and 7,387.56 is: 10,194.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.76 : 18,430.80 = 7,387.56 : x
  2. Step 2: Convert to fraction form
    13,355.76/18,430.80 = 7,387.56/x
  3. Step 3: Cross multiply
    13,355.76x = 18,430.80 × 7,387.56
  4. Step 4: Simplify right side
    13,355.76x = 136,158,640.85
  5. Step 5: Solve for x
    x = 136,158,640.85/13,355.76
  6. Step 6: Final answer
    x = 10,194.75

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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.