Home / 21,680.84-29,915.73-12,117.67

Finding the Fourth Proportional to 21,680.84, 29,915.73 and 12,117.67

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Solution

The fourth proportional to 21,680.84, 29,915.73 and 12,117.67 is: 16,720.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.84 : 29,915.73 = 12,117.67 : x
  2. Step 2: Convert to fraction form
    21,680.84/29,915.73 = 12,117.67/x
  3. Step 3: Cross multiply
    21,680.84x = 29,915.73 × 12,117.67
  4. Step 4: Simplify right side
    21,680.84x = 362,508,906.55
  5. Step 5: Solve for x
    x = 362,508,906.55/21,680.84
  6. Step 6: Final answer
    x = 16,720.24

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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.