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Finding the Fourth Proportional to 18,702.60, 25,809.72 and 11,152.32

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Solution

The fourth proportional to 18,702.60, 25,809.72 and 11,152.32 is: 15,390.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.60 : 25,809.72 = 11,152.32 : x
  2. Step 2: Convert to fraction form
    18,702.60/25,809.72 = 11,152.32/x
  3. Step 3: Cross multiply
    18,702.60x = 25,809.72 × 11,152.32
  4. Step 4: Simplify right side
    18,702.60x = 287,838,256.55
  5. Step 5: Solve for x
    x = 287,838,256.55/18,702.60
  6. Step 6: Final answer
    x = 15,390.28

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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.