Home / 12,970.72-19,426.80-7,765.60

Finding the Fourth Proportional to 12,970.72, 19,426.80 and 7,765.60

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Solution

The fourth proportional to 12,970.72, 19,426.80 and 7,765.60 is: 11,630.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,970.72 : 19,426.80 = 7,765.60 : x
  2. Step 2: Convert to fraction form
    12,970.72/19,426.80 = 7,765.60/x
  3. Step 3: Cross multiply
    12,970.72x = 19,426.80 × 7,765.60
  4. Step 4: Simplify right side
    12,970.72x = 150,860,758.08
  5. Step 5: Solve for x
    x = 150,860,758.08/12,970.72
  6. Step 6: Final answer
    x = 11,630.87

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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.