Home / 12,457,876.80-18,686,815.20-12,289,915.20

Finding the Fourth Proportional to 12,457,876.80, 18,686,815.20 and 12,289,915.20

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Solution

The fourth proportional to 12,457,876.80, 18,686,815.20 and 12,289,915.20 is: 18,434,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457,876.80 : 18,686,815.20 = 12,289,915.20 : x
  2. Step 2: Convert to fraction form
    12,457,876.80/18,686,815.20 = 12,289,915.20/x
  3. Step 3: Cross multiply
    12,457,876.80x = 18,686,815.20 × 12,289,915.20
  4. Step 4: Simplify right side
    12,457,876.80x = 229,659,374,166,071.03
  5. Step 5: Solve for x
    x = 229,659,374,166,071.03/12,457,876.80
  6. Step 6: Final answer
    x = 18,434,872.80

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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.