Home / 21,152.69-29,177.47-13,608.84

Finding the Fourth Proportional to 21,152.69, 29,177.47 and 13,608.84

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Solution

The fourth proportional to 21,152.69, 29,177.47 and 13,608.84 is: 18,771.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.69 : 29,177.47 = 13,608.84 : x
  2. Step 2: Convert to fraction form
    21,152.69/29,177.47 = 13,608.84/x
  3. Step 3: Cross multiply
    21,152.69x = 29,177.47 × 13,608.84
  4. Step 4: Simplify right side
    21,152.69x = 397,071,520.83
  5. Step 5: Solve for x
    x = 397,071,520.83/21,152.69
  6. Step 6: Final answer
    x = 18,771.68

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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.