Home / 12,872.40-19,308.60-7,688.40

Finding the Fourth Proportional to 12,872.40, 19,308.60 and 7,688.40

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Solution

The fourth proportional to 12,872.40, 19,308.60 and 7,688.40 is: 11,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,872.40 : 19,308.60 = 7,688.40 : x
  2. Step 2: Convert to fraction form
    12,872.40/19,308.60 = 7,688.40/x
  3. Step 3: Cross multiply
    12,872.40x = 19,308.60 × 7,688.40
  4. Step 4: Simplify right side
    12,872.40x = 148,452,240.24
  5. Step 5: Solve for x
    x = 148,452,240.24/12,872.40
  6. Step 6: Final answer
    x = 11,532.60

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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.