Home / 21,006.60-31,480.20-11,650.74

Finding the Fourth Proportional to 21,006.60, 31,480.20 and 11,650.74

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Solution

The fourth proportional to 21,006.60, 31,480.20 and 11,650.74 is: 17,459.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.60 : 31,480.20 = 11,650.74 : x
  2. Step 2: Convert to fraction form
    21,006.60/31,480.20 = 11,650.74/x
  3. Step 3: Cross multiply
    21,006.60x = 31,480.20 × 11,650.74
  4. Step 4: Simplify right side
    21,006.60x = 366,767,625.35
  5. Step 5: Solve for x
    x = 366,767,625.35/21,006.60
  6. Step 6: Final answer
    x = 17,459.64

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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.