Home / 15,400.21-21,255.59-9,731.36

Finding the Fourth Proportional to 15,400.21, 21,255.59 and 9,731.36

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Solution

The fourth proportional to 15,400.21, 21,255.59 and 9,731.36 is: 13,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.21 : 21,255.59 = 9,731.36 : x
  2. Step 2: Convert to fraction form
    15,400.21/21,255.59 = 9,731.36/x
  3. Step 3: Cross multiply
    15,400.21x = 21,255.59 × 9,731.36
  4. Step 4: Simplify right side
    15,400.21x = 206,845,798.30
  5. Step 5: Solve for x
    x = 206,845,798.30/15,400.21
  6. Step 6: Final answer
    x = 13,431.36

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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.