Home / 21,416.51-31,943.67-20,181.69

Finding the Fourth Proportional to 21,416.51, 31,943.67 and 20,181.69

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Solution

The fourth proportional to 21,416.51, 31,943.67 and 20,181.69 is: 30,101.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.51 : 31,943.67 = 20,181.69 : x
  2. Step 2: Convert to fraction form
    21,416.51/31,943.67 = 20,181.69/x
  3. Step 3: Cross multiply
    21,416.51x = 31,943.67 × 20,181.69
  4. Step 4: Simplify right side
    21,416.51x = 644,677,245.40
  5. Step 5: Solve for x
    x = 644,677,245.40/21,416.51
  6. Step 6: Final answer
    x = 30,101.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.