Home / 28,782.40-39,720.58-15,863.04

Finding the Fourth Proportional to 28,782.40, 39,720.58 and 15,863.04

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Solution

The fourth proportional to 28,782.40, 39,720.58 and 15,863.04 is: 21,891.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,782.40 : 39,720.58 = 15,863.04 : x
  2. Step 2: Convert to fraction form
    28,782.40/39,720.58 = 15,863.04/x
  3. Step 3: Cross multiply
    28,782.40x = 39,720.58 × 15,863.04
  4. Step 4: Simplify right side
    28,782.40x = 630,089,149.36
  5. Step 5: Solve for x
    x = 630,089,149.36/28,782.40
  6. Step 6: Final answer
    x = 21,891.47

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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.