Home / 28,631.98-39,512.40-15,885.42

Finding the Fourth Proportional to 28,631.98, 39,512.40 and 15,885.42

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Solution

The fourth proportional to 28,631.98, 39,512.40 and 15,885.42 is: 21,922.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.98 : 39,512.40 = 15,885.42 : x
  2. Step 2: Convert to fraction form
    28,631.98/39,512.40 = 15,885.42/x
  3. Step 3: Cross multiply
    28,631.98x = 39,512.40 × 15,885.42
  4. Step 4: Simplify right side
    28,631.98x = 627,671,069.21
  5. Step 5: Solve for x
    x = 627,671,069.21/28,631.98
  6. Step 6: Final answer
    x = 21,922.03

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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.