Home / 28,675.81-39,571.34-15,929.88

Finding the Fourth Proportional to 28,675.81, 39,571.34 and 15,929.88

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Solution

The fourth proportional to 28,675.81, 39,571.34 and 15,929.88 is: 21,982.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,675.81 : 39,571.34 = 15,929.88 : x
  2. Step 2: Convert to fraction form
    28,675.81/39,571.34 = 15,929.88/x
  3. Step 3: Cross multiply
    28,675.81x = 39,571.34 × 15,929.88
  4. Step 4: Simplify right side
    28,675.81x = 630,366,525.24
  5. Step 5: Solve for x
    x = 630,366,525.24/28,675.81
  6. Step 6: Final answer
    x = 21,982.52

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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.