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Finding the Fourth Proportional to 14,287.32, 19,714.15 and 8,978.38

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Solution

The fourth proportional to 14,287.32, 19,714.15 and 8,978.38 is: 12,388.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,287.32 : 19,714.15 = 8,978.38 : x
  2. Step 2: Convert to fraction form
    14,287.32/19,714.15 = 8,978.38/x
  3. Step 3: Cross multiply
    14,287.32x = 19,714.15 × 8,978.38
  4. Step 4: Simplify right side
    14,287.32x = 177,001,130.08
  5. Step 5: Solve for x
    x = 177,001,130.08/14,287.32
  6. Step 6: Final answer
    x = 12,388.69

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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.