Home / 21,751.77-29,975.40-15,453.21

Finding the Fourth Proportional to 21,751.77, 29,975.40 and 15,453.21

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Solution

The fourth proportional to 21,751.77, 29,975.40 and 15,453.21 is: 21,295.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.77 : 29,975.40 = 15,453.21 : x
  2. Step 2: Convert to fraction form
    21,751.77/29,975.40 = 15,453.21/x
  3. Step 3: Cross multiply
    21,751.77x = 29,975.40 × 15,453.21
  4. Step 4: Simplify right side
    21,751.77x = 463,216,001.16
  5. Step 5: Solve for x
    x = 463,216,001.16/21,751.77
  6. Step 6: Final answer
    x = 21,295.56

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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.