Home / 28,479.48-39,312.90-18,787.38

Finding the Fourth Proportional to 28,479.48, 39,312.90 and 18,787.38

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Solution

The fourth proportional to 28,479.48, 39,312.90 and 18,787.38 is: 25,933.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.48 : 39,312.90 = 18,787.38 : x
  2. Step 2: Convert to fraction form
    28,479.48/39,312.90 = 18,787.38/x
  3. Step 3: Cross multiply
    28,479.48x = 39,312.90 × 18,787.38
  4. Step 4: Simplify right side
    28,479.48x = 738,586,391.20
  5. Step 5: Solve for x
    x = 738,586,391.20/28,479.48
  6. Step 6: Final answer
    x = 25,933.98

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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.