Home / 21,438.98-29,571.03-15,079.06

Finding the Fourth Proportional to 21,438.98, 29,571.03 and 15,079.06

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Solution

The fourth proportional to 21,438.98, 29,571.03 and 15,079.06 is: 20,798.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.98 : 29,571.03 = 15,079.06 : x
  2. Step 2: Convert to fraction form
    21,438.98/29,571.03 = 15,079.06/x
  3. Step 3: Cross multiply
    21,438.98x = 29,571.03 × 15,079.06
  4. Step 4: Simplify right side
    21,438.98x = 445,903,335.63
  5. Step 5: Solve for x
    x = 445,903,335.63/21,438.98
  6. Step 6: Final answer
    x = 20,798.72

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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.