Home / 20,670.58-28,529.36-11,718.12

Finding the Fourth Proportional to 20,670.58, 28,529.36 and 11,718.12

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Solution

The fourth proportional to 20,670.58, 28,529.36 and 11,718.12 is: 16,173.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.58 : 28,529.36 = 11,718.12 : x
  2. Step 2: Convert to fraction form
    20,670.58/28,529.36 = 11,718.12/x
  3. Step 3: Cross multiply
    20,670.58x = 28,529.36 × 11,718.12
  4. Step 4: Simplify right side
    20,670.58x = 334,310,357.02
  5. Step 5: Solve for x
    x = 334,310,357.02/20,670.58
  6. Step 6: Final answer
    x = 16,173.25

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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.