Home / 11,920.50-16,450.65-6,615.81

Finding the Fourth Proportional to 11,920.50, 16,450.65 and 6,615.81

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Solution

The fourth proportional to 11,920.50, 16,450.65 and 6,615.81 is: 9,130.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.50 : 16,450.65 = 6,615.81 : x
  2. Step 2: Convert to fraction form
    11,920.50/16,450.65 = 6,615.81/x
  3. Step 3: Cross multiply
    11,920.50x = 16,450.65 × 6,615.81
  4. Step 4: Simplify right side
    11,920.50x = 108,834,374.78
  5. Step 5: Solve for x
    x = 108,834,374.78/11,920.50
  6. Step 6: Final answer
    x = 9,130.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.