Home / 21,786.42-30,055.28-12,829.63

Finding the Fourth Proportional to 21,786.42, 30,055.28 and 12,829.63

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Solution

The fourth proportional to 21,786.42, 30,055.28 and 12,829.63 is: 17,699.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,786.42 : 30,055.28 = 12,829.63 : x
  2. Step 2: Convert to fraction form
    21,786.42/30,055.28 = 12,829.63/x
  3. Step 3: Cross multiply
    21,786.42x = 30,055.28 × 12,829.63
  4. Step 4: Simplify right side
    21,786.42x = 385,598,159.63
  5. Step 5: Solve for x
    x = 385,598,159.63/21,786.42
  6. Step 6: Final answer
    x = 17,699.01

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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.