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Finding the Fourth Proportional to 13,706.84, 18,915.06 and 7,656.92

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Solution

The fourth proportional to 13,706.84, 18,915.06 and 7,656.92 is: 10,566.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,706.84 : 18,915.06 = 7,656.92 : x
  2. Step 2: Convert to fraction form
    13,706.84/18,915.06 = 7,656.92/x
  3. Step 3: Cross multiply
    13,706.84x = 18,915.06 × 7,656.92
  4. Step 4: Simplify right side
    13,706.84x = 144,831,101.22
  5. Step 5: Solve for x
    x = 144,831,101.22/13,706.84
  6. Step 6: Final answer
    x = 10,566.34

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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.