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Finding the Fourth Proportional to 19,059.92, 28,603.80 and 18,915.12

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Solution

The fourth proportional to 19,059.92, 28,603.80 and 18,915.12 is: 28,386.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,059.92 : 28,603.80 = 18,915.12 : x
  2. Step 2: Convert to fraction form
    19,059.92/28,603.80 = 18,915.12/x
  3. Step 3: Cross multiply
    19,059.92x = 28,603.80 × 18,915.12
  4. Step 4: Simplify right side
    19,059.92x = 541,044,309.46
  5. Step 5: Solve for x
    x = 541,044,309.46/19,059.92
  6. Step 6: Final answer
    x = 28,386.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.