Home / 28,919.10-39,915.03-18,829.98

Finding the Fourth Proportional to 28,919.10, 39,915.03 and 18,829.98

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Solution

The fourth proportional to 28,919.10, 39,915.03 and 18,829.98 is: 25,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.10 : 39,915.03 = 18,829.98 : x
  2. Step 2: Convert to fraction form
    28,919.10/39,915.03 = 18,829.98/x
  3. Step 3: Cross multiply
    28,919.10x = 39,915.03 × 18,829.98
  4. Step 4: Simplify right side
    28,919.10x = 751,599,216.60
  5. Step 5: Solve for x
    x = 751,599,216.60/28,919.10
  6. Step 6: Final answer
    x = 25,989.72

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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.