Home / 21,659.09-29,881.79-13,157.74

Finding the Fourth Proportional to 21,659.09, 29,881.79 and 13,157.74

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Solution

The fourth proportional to 21,659.09, 29,881.79 and 13,157.74 is: 18,152.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,659.09 : 29,881.79 = 13,157.74 : x
  2. Step 2: Convert to fraction form
    21,659.09/29,881.79 = 13,157.74/x
  3. Step 3: Cross multiply
    21,659.09x = 29,881.79 × 13,157.74
  4. Step 4: Simplify right side
    21,659.09x = 393,176,674.15
  5. Step 5: Solve for x
    x = 393,176,674.15/21,659.09
  6. Step 6: Final answer
    x = 18,152.96

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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.