Home / 21,431.34-29,544.78-15,756.06

Finding the Fourth Proportional to 21,431.34, 29,544.78 and 15,756.06

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Solution

The fourth proportional to 21,431.34, 29,544.78 and 15,756.06 is: 21,720.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.34 : 29,544.78 = 15,756.06 : x
  2. Step 2: Convert to fraction form
    21,431.34/29,544.78 = 15,756.06/x
  3. Step 3: Cross multiply
    21,431.34x = 29,544.78 × 15,756.06
  4. Step 4: Simplify right side
    21,431.34x = 465,509,326.37
  5. Step 5: Solve for x
    x = 465,509,326.37/21,431.34
  6. Step 6: Final answer
    x = 21,720.96

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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.