Home / 21,099.58-31,649.40-8,625.49

Finding the Fourth Proportional to 21,099.58, 31,649.40 and 8,625.49

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Solution

The fourth proportional to 21,099.58, 31,649.40 and 8,625.49 is: 12,938.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.58 : 31,649.40 = 8,625.49 : x
  2. Step 2: Convert to fraction form
    21,099.58/31,649.40 = 8,625.49/x
  3. Step 3: Cross multiply
    21,099.58x = 31,649.40 × 8,625.49
  4. Step 4: Simplify right side
    21,099.58x = 272,991,583.21
  5. Step 5: Solve for x
    x = 272,991,583.21/21,099.58
  6. Step 6: Final answer
    x = 12,938.25

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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.