Home / 21,051.51-31,549.86-8,556.81

Finding the Fourth Proportional to 21,051.51, 31,549.86 and 8,556.81

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Solution

The fourth proportional to 21,051.51, 31,549.86 and 8,556.81 is: 12,824.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.51 : 31,549.86 = 8,556.81 : x
  2. Step 2: Convert to fraction form
    21,051.51/31,549.86 = 8,556.81/x
  3. Step 3: Cross multiply
    21,051.51x = 31,549.86 × 8,556.81
  4. Step 4: Simplify right side
    21,051.51x = 269,966,157.55
  5. Step 5: Solve for x
    x = 269,966,157.55/21,051.51
  6. Step 6: Final answer
    x = 12,824.08

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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.