Home / 21,986.95-30,341.94-11,915.62

Finding the Fourth Proportional to 21,986.95, 30,341.94 and 11,915.62

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Solution

The fourth proportional to 21,986.95, 30,341.94 and 11,915.62 is: 16,443.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.95 : 30,341.94 = 11,915.62 : x
  2. Step 2: Convert to fraction form
    21,986.95/30,341.94 = 11,915.62/x
  3. Step 3: Cross multiply
    21,986.95x = 30,341.94 × 11,915.62
  4. Step 4: Simplify right side
    21,986.95x = 361,543,027.10
  5. Step 5: Solve for x
    x = 361,543,027.10/21,986.95
  6. Step 6: Final answer
    x = 16,443.53

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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.