Home / 21,907.02-30,243.06-13,421.46

Finding the Fourth Proportional to 21,907.02, 30,243.06 and 13,421.46

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Solution

The fourth proportional to 21,907.02, 30,243.06 and 13,421.46 is: 18,528.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907.02 : 30,243.06 = 13,421.46 : x
  2. Step 2: Convert to fraction form
    21,907.02/30,243.06 = 13,421.46/x
  3. Step 3: Cross multiply
    21,907.02x = 30,243.06 × 13,421.46
  4. Step 4: Simplify right side
    21,907.02x = 405,906,020.07
  5. Step 5: Solve for x
    x = 405,906,020.07/21,907.02
  6. Step 6: Final answer
    x = 18,528.58

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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.