Home / 28,185.06-38,895.96-15,438.79

Finding the Fourth Proportional to 28,185.06, 38,895.96 and 15,438.79

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Solution

The fourth proportional to 28,185.06, 38,895.96 and 15,438.79 is: 21,305.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.06 : 38,895.96 = 15,438.79 : x
  2. Step 2: Convert to fraction form
    28,185.06/38,895.96 = 15,438.79/x
  3. Step 3: Cross multiply
    28,185.06x = 38,895.96 × 15,438.79
  4. Step 4: Simplify right side
    28,185.06x = 600,506,446.01
  5. Step 5: Solve for x
    x = 600,506,446.01/28,185.06
  6. Step 6: Final answer
    x = 21,305.84

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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.