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Finding the Fourth Proportional to 18,702.32, 28,059.18 and 11,214.20

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Solution

The fourth proportional to 18,702.32, 28,059.18 and 11,214.20 is: 16,824.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.32 : 28,059.18 = 11,214.20 : x
  2. Step 2: Convert to fraction form
    18,702.32/28,059.18 = 11,214.20/x
  3. Step 3: Cross multiply
    18,702.32x = 28,059.18 × 11,214.20
  4. Step 4: Simplify right side
    18,702.32x = 314,661,256.36
  5. Step 5: Solve for x
    x = 314,661,256.36/18,702.32
  6. Step 6: Final answer
    x = 16,824.72

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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.