Home / 12,390.40-18,579.45-4,492.60

Finding the Fourth Proportional to 12,390.40, 18,579.45 and 4,492.60

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Solution

The fourth proportional to 12,390.40, 18,579.45 and 4,492.60 is: 6,736.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.40 : 18,579.45 = 4,492.60 : x
  2. Step 2: Convert to fraction form
    12,390.40/18,579.45 = 4,492.60/x
  3. Step 3: Cross multiply
    12,390.40x = 18,579.45 × 4,492.60
  4. Step 4: Simplify right side
    12,390.40x = 83,470,037.07
  5. Step 5: Solve for x
    x = 83,470,037.07/12,390.40
  6. Step 6: Final answer
    x = 6,736.67

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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.