Home / 28,678.19-39,576.20-15,932.16

Finding the Fourth Proportional to 28,678.19, 39,576.20 and 15,932.16

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Solution

The fourth proportional to 28,678.19, 39,576.20 and 15,932.16 is: 21,986.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.19 : 39,576.20 = 15,932.16 : x
  2. Step 2: Convert to fraction form
    28,678.19/39,576.20 = 15,932.16/x
  3. Step 3: Cross multiply
    28,678.19x = 39,576.20 × 15,932.16
  4. Step 4: Simplify right side
    28,678.19x = 630,534,270.93
  5. Step 5: Solve for x
    x = 630,534,270.93/28,678.19
  6. Step 6: Final answer
    x = 21,986.55

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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.