Home / 12,981.60-19,477.80-4,219.20

Finding the Fourth Proportional to 12,981.60, 19,477.80 and 4,219.20

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Solution

The fourth proportional to 12,981.60, 19,477.80 and 4,219.20 is: 6,330.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.60 : 19,477.80 = 4,219.20 : x
  2. Step 2: Convert to fraction form
    12,981.60/19,477.80 = 4,219.20/x
  3. Step 3: Cross multiply
    12,981.60x = 19,477.80 × 4,219.20
  4. Step 4: Simplify right side
    12,981.60x = 82,180,733.76
  5. Step 5: Solve for x
    x = 82,180,733.76/12,981.60
  6. Step 6: Final answer
    x = 6,330.56

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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.