Home / 20,970.94-28,928.87-12,467.02

Finding the Fourth Proportional to 20,970.94, 28,928.87 and 12,467.02

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Solution

The fourth proportional to 20,970.94, 28,928.87 and 12,467.02 is: 17,197.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.94 : 28,928.87 = 12,467.02 : x
  2. Step 2: Convert to fraction form
    20,970.94/28,928.87 = 12,467.02/x
  3. Step 3: Cross multiply
    20,970.94x = 28,928.87 × 12,467.02
  4. Step 4: Simplify right side
    20,970.94x = 360,656,671.81
  5. Step 5: Solve for x
    x = 360,656,671.81/20,970.94
  6. Step 6: Final answer
    x = 17,197.92

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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.