Home / 20,670.34-30,987.96-8,199.16

Finding the Fourth Proportional to 20,670.34, 30,987.96 and 8,199.16

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Solution

The fourth proportional to 20,670.34, 30,987.96 and 8,199.16 is: 12,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.34 : 30,987.96 = 8,199.16 : x
  2. Step 2: Convert to fraction form
    20,670.34/30,987.96 = 8,199.16/x
  3. Step 3: Cross multiply
    20,670.34x = 30,987.96 × 8,199.16
  4. Step 4: Simplify right side
    20,670.34x = 254,075,242.11
  5. Step 5: Solve for x
    x = 254,075,242.11/20,670.34
  6. Step 6: Final answer
    x = 12,291.78

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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.