Home / 12,930.40-19,395.60-7,681.60

Finding the Fourth Proportional to 12,930.40, 19,395.60 and 7,681.60

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Solution

The fourth proportional to 12,930.40, 19,395.60 and 7,681.60 is: 11,522.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.40 : 19,395.60 = 7,681.60 : x
  2. Step 2: Convert to fraction form
    12,930.40/19,395.60 = 7,681.60/x
  3. Step 3: Cross multiply
    12,930.40x = 19,395.60 × 7,681.60
  4. Step 4: Simplify right side
    12,930.40x = 148,989,240.96
  5. Step 5: Solve for x
    x = 148,989,240.96/12,930.40
  6. Step 6: Final answer
    x = 11,522.40

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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.