Home / 28,670.58-39,560.49-15,921.72

Finding the Fourth Proportional to 28,670.58, 39,560.49 and 15,921.72

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Solution

The fourth proportional to 28,670.58, 39,560.49 and 15,921.72 is: 21,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,670.58 : 39,560.49 = 15,921.72 : x
  2. Step 2: Convert to fraction form
    28,670.58/39,560.49 = 15,921.72/x
  3. Step 3: Cross multiply
    28,670.58x = 39,560.49 × 15,921.72
  4. Step 4: Simplify right side
    28,670.58x = 629,871,044.84
  5. Step 5: Solve for x
    x = 629,871,044.84/28,670.58
  6. Step 6: Final answer
    x = 21,969.25

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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.