Home / 28,208.88-38,915.70-18,135.45

Finding the Fourth Proportional to 28,208.88, 38,915.70 and 18,135.45

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Solution

The fourth proportional to 28,208.88, 38,915.70 and 18,135.45 is: 25,018.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,208.88 : 38,915.70 = 18,135.45 : x
  2. Step 2: Convert to fraction form
    28,208.88/38,915.70 = 18,135.45/x
  3. Step 3: Cross multiply
    28,208.88x = 38,915.70 × 18,135.45
  4. Step 4: Simplify right side
    28,208.88x = 705,753,731.57
  5. Step 5: Solve for x
    x = 705,753,731.57/28,208.88
  6. Step 6: Final answer
    x = 25,018.85

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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.