Home / 20,675.89-28,539.12-15,377.88

Finding the Fourth Proportional to 20,675.89, 28,539.12 and 15,377.88

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Solution

The fourth proportional to 20,675.89, 28,539.12 and 15,377.88 is: 21,226.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.89 : 28,539.12 = 15,377.88 : x
  2. Step 2: Convert to fraction form
    20,675.89/28,539.12 = 15,377.88/x
  3. Step 3: Cross multiply
    20,675.89x = 28,539.12 × 15,377.88
  4. Step 4: Simplify right side
    20,675.89x = 438,871,162.67
  5. Step 5: Solve for x
    x = 438,871,162.67/20,675.89
  6. Step 6: Final answer
    x = 21,226.23

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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.