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Finding the Fourth Proportional to 18,702.40, 28,015.20 and 15,246.40

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Solution

The fourth proportional to 18,702.40, 28,015.20 and 15,246.40 is: 22,838.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.40 : 28,015.20 = 15,246.40 : x
  2. Step 2: Convert to fraction form
    18,702.40/28,015.20 = 15,246.40/x
  3. Step 3: Cross multiply
    18,702.40x = 28,015.20 × 15,246.40
  4. Step 4: Simplify right side
    18,702.40x = 427,130,945.28
  5. Step 5: Solve for x
    x = 427,130,945.28/18,702.40
  6. Step 6: Final answer
    x = 22,838.30

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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.