Home / 21,739.25-29,999.31-12,307.82

Finding the Fourth Proportional to 21,739.25, 29,999.31 and 12,307.82

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Solution

The fourth proportional to 21,739.25, 29,999.31 and 12,307.82 is: 16,984.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.25 : 29,999.31 = 12,307.82 : x
  2. Step 2: Convert to fraction form
    21,739.25/29,999.31 = 12,307.82/x
  3. Step 3: Cross multiply
    21,739.25x = 29,999.31 × 12,307.82
  4. Step 4: Simplify right side
    21,739.25x = 369,225,980.68
  5. Step 5: Solve for x
    x = 369,225,980.68/21,739.25
  6. Step 6: Final answer
    x = 16,984.30

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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.