Home / 28,631.84-39,512.28-15,885.26

Finding the Fourth Proportional to 28,631.84, 39,512.28 and 15,885.26

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Solution

The fourth proportional to 28,631.84, 39,512.28 and 15,885.26 is: 21,921.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.84 : 39,512.28 = 15,885.26 : x
  2. Step 2: Convert to fraction form
    28,631.84/39,512.28 = 15,885.26/x
  3. Step 3: Cross multiply
    28,631.84x = 39,512.28 × 15,885.26
  4. Step 4: Simplify right side
    28,631.84x = 627,662,840.99
  5. Step 5: Solve for x
    x = 627,662,840.99/28,631.84
  6. Step 6: Final answer
    x = 21,921.85

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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.