Home / 19,219.84-28,829.60-12,990.40

Finding the Fourth Proportional to 19,219.84, 28,829.60 and 12,990.40

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Solution

The fourth proportional to 19,219.84, 28,829.60 and 12,990.40 is: 19,485.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,219.84 : 28,829.60 = 12,990.40 : x
  2. Step 2: Convert to fraction form
    19,219.84/28,829.60 = 12,990.40/x
  3. Step 3: Cross multiply
    19,219.84x = 28,829.60 × 12,990.40
  4. Step 4: Simplify right side
    19,219.84x = 374,508,035.84
  5. Step 5: Solve for x
    x = 374,508,035.84/19,219.84
  6. Step 6: Final answer
    x = 19,485.49

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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.