Home / 13,120.93-19,663.77-7,188.89

Finding the Fourth Proportional to 13,120.93, 19,663.77 and 7,188.89

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Solution

The fourth proportional to 13,120.93, 19,663.77 and 7,188.89 is: 10,773.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.93 : 19,663.77 = 7,188.89 : x
  2. Step 2: Convert to fraction form
    13,120.93/19,663.77 = 7,188.89/x
  3. Step 3: Cross multiply
    13,120.93x = 19,663.77 × 7,188.89
  4. Step 4: Simplify right side
    13,120.93x = 141,360,728.67
  5. Step 5: Solve for x
    x = 141,360,728.67/13,120.93
  6. Step 6: Final answer
    x = 10,773.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.