Home / 28,485.76-39,310.88-15,739.65

Finding the Fourth Proportional to 28,485.76, 39,310.88 and 15,739.65

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Solution

The fourth proportional to 28,485.76, 39,310.88 and 15,739.65 is: 21,721.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.76 : 39,310.88 = 15,739.65 : x
  2. Step 2: Convert to fraction form
    28,485.76/39,310.88 = 15,739.65/x
  3. Step 3: Cross multiply
    28,485.76x = 39,310.88 × 15,739.65
  4. Step 4: Simplify right side
    28,485.76x = 618,739,492.39
  5. Step 5: Solve for x
    x = 618,739,492.39/28,485.76
  6. Step 6: Final answer
    x = 21,721.01

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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.