Home / 28,231.84-38,958.96-15,657.76

Finding the Fourth Proportional to 28,231.84, 38,958.96 and 15,657.76

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Solution

The fourth proportional to 28,231.84, 38,958.96 and 15,657.76 is: 21,607.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.84 : 38,958.96 = 15,657.76 : x
  2. Step 2: Convert to fraction form
    28,231.84/38,958.96 = 15,657.76/x
  3. Step 3: Cross multiply
    28,231.84x = 38,958.96 × 15,657.76
  4. Step 4: Simplify right side
    28,231.84x = 610,010,045.53
  5. Step 5: Solve for x
    x = 610,010,045.53/28,231.84
  6. Step 6: Final answer
    x = 21,607.17

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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.