Home / 12,878.20-19,346.10-12,353.40

Finding the Fourth Proportional to 12,878.20, 19,346.10 and 12,353.40

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Solution

The fourth proportional to 12,878.20, 19,346.10 and 12,353.40 is: 18,557.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.20 : 19,346.10 = 12,353.40 : x
  2. Step 2: Convert to fraction form
    12,878.20/19,346.10 = 12,353.40/x
  3. Step 3: Cross multiply
    12,878.20x = 19,346.10 × 12,353.40
  4. Step 4: Simplify right side
    12,878.20x = 238,990,111.74
  5. Step 5: Solve for x
    x = 238,990,111.74/12,878.20
  6. Step 6: Final answer
    x = 18,557.73

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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.