Home / 12,590.40-18,885.60-7,675.20

Finding the Fourth Proportional to 12,590.40, 18,885.60 and 7,675.20

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Solution

The fourth proportional to 12,590.40, 18,885.60 and 7,675.20 is: 11,512.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.40 : 18,885.60 = 7,675.20 : x
  2. Step 2: Convert to fraction form
    12,590.40/18,885.60 = 7,675.20/x
  3. Step 3: Cross multiply
    12,590.40x = 18,885.60 × 7,675.20
  4. Step 4: Simplify right side
    12,590.40x = 144,950,757.12
  5. Step 5: Solve for x
    x = 144,950,757.12/12,590.40
  6. Step 6: Final answer
    x = 11,512.80

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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.