Home / 21,237.93-29,309.10-11,678.55

Finding the Fourth Proportional to 21,237.93, 29,309.10 and 11,678.55

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Solution

The fourth proportional to 21,237.93, 29,309.10 and 11,678.55 is: 16,116.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.93 : 29,309.10 = 11,678.55 : x
  2. Step 2: Convert to fraction form
    21,237.93/29,309.10 = 11,678.55/x
  3. Step 3: Cross multiply
    21,237.93x = 29,309.10 × 11,678.55
  4. Step 4: Simplify right side
    21,237.93x = 342,287,584.87
  5. Step 5: Solve for x
    x = 342,287,584.87/21,237.93
  6. Step 6: Final answer
    x = 16,116.81

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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.