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Finding the Fourth Proportional to 8,638.80, 11,925 and 5,498.88

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Solution

The fourth proportional to 8,638.80, 11,925 and 5,498.88 is: 7,590.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.80 : 11,925 = 5,498.88 : x
  2. Step 2: Convert to fraction form
    8,638.80/11,925 = 5,498.88/x
  3. Step 3: Cross multiply
    8,638.80x = 11,925 × 5,498.88
  4. Step 4: Simplify right side
    8,638.80x = 65,574,144
  5. Step 5: Solve for x
    x = 65,574,144/8,638.80
  6. Step 6: Final answer
    x = 7,590.65

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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.