Home / 13,678.50-18,915.21-13,059.66

Finding the Fourth Proportional to 13,678.50, 18,915.21 and 13,059.66

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Solution

The fourth proportional to 13,678.50, 18,915.21 and 13,059.66 is: 18,059.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.50 : 18,915.21 = 13,059.66 : x
  2. Step 2: Convert to fraction form
    13,678.50/18,915.21 = 13,059.66/x
  3. Step 3: Cross multiply
    13,678.50x = 18,915.21 × 13,059.66
  4. Step 4: Simplify right side
    13,678.50x = 247,026,211.43
  5. Step 5: Solve for x
    x = 247,026,211.43/13,678.50
  6. Step 6: Final answer
    x = 18,059.45

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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.