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Finding the Fourth Proportional to 12,164.50, 16,788.62 and 7,130.70

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Solution

The fourth proportional to 12,164.50, 16,788.62 and 7,130.70 is: 9,841.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,164.50 : 16,788.62 = 7,130.70 : x
  2. Step 2: Convert to fraction form
    12,164.50/16,788.62 = 7,130.70/x
  3. Step 3: Cross multiply
    12,164.50x = 16,788.62 × 7,130.70
  4. Step 4: Simplify right side
    12,164.50x = 119,714,590.35
  5. Step 5: Solve for x
    x = 119,714,590.35/12,164.50
  6. Step 6: Final answer
    x = 9,841.31

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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.