Home / 12,416.90-18,508.38-11,420.45

Finding the Fourth Proportional to 12,416.90, 18,508.38 and 11,420.45

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Solution

The fourth proportional to 12,416.90, 18,508.38 and 11,420.45 is: 17,023.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,416.90 : 18,508.38 = 11,420.45 : x
  2. Step 2: Convert to fraction form
    12,416.90/18,508.38 = 11,420.45/x
  3. Step 3: Cross multiply
    12,416.90x = 18,508.38 × 11,420.45
  4. Step 4: Simplify right side
    12,416.90x = 211,374,074.64
  5. Step 5: Solve for x
    x = 211,374,074.64/12,416.90
  6. Step 6: Final answer
    x = 17,023.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.