Home / 28,118.44-42,189.36-12,315.32

Finding the Fourth Proportional to 28,118.44, 42,189.36 and 12,315.32

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Solution

The fourth proportional to 28,118.44, 42,189.36 and 12,315.32 is: 18,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.44 : 42,189.36 = 12,315.32 : x
  2. Step 2: Convert to fraction form
    28,118.44/42,189.36 = 12,315.32/x
  3. Step 3: Cross multiply
    28,118.44x = 42,189.36 × 12,315.32
  4. Step 4: Simplify right side
    28,118.44x = 519,575,469.00
  5. Step 5: Solve for x
    x = 519,575,469.00/28,118.44
  6. Step 6: Final answer
    x = 18,478.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.