Home / 20,478.04-30,774.90-12,159.64

Finding the Fourth Proportional to 20,478.04, 30,774.90 and 12,159.64

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Solution

The fourth proportional to 20,478.04, 30,774.90 and 12,159.64 is: 18,273.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.04 : 30,774.90 = 12,159.64 : x
  2. Step 2: Convert to fraction form
    20,478.04/30,774.90 = 12,159.64/x
  3. Step 3: Cross multiply
    20,478.04x = 30,774.90 × 12,159.64
  4. Step 4: Simplify right side
    20,478.04x = 374,211,705.04
  5. Step 5: Solve for x
    x = 374,211,705.04/20,478.04
  6. Step 6: Final answer
    x = 18,273.80

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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.