Home / 21,530.89-29,715.36-12,099.45

Finding the Fourth Proportional to 21,530.89, 29,715.36 and 12,099.45

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Solution

The fourth proportional to 21,530.89, 29,715.36 and 12,099.45 is: 16,698.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.89 : 29,715.36 = 12,099.45 : x
  2. Step 2: Convert to fraction form
    21,530.89/29,715.36 = 12,099.45/x
  3. Step 3: Cross multiply
    21,530.89x = 29,715.36 × 12,099.45
  4. Step 4: Simplify right side
    21,530.89x = 359,539,512.55
  5. Step 5: Solve for x
    x = 359,539,512.55/21,530.89
  6. Step 6: Final answer
    x = 16,698.78

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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.