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Finding the Fourth Proportional to 14,987.82, 20,690.19 and 8,698.98

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Solution

The fourth proportional to 14,987.82, 20,690.19 and 8,698.98 is: 12,008.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.82 : 20,690.19 = 8,698.98 : x
  2. Step 2: Convert to fraction form
    14,987.82/20,690.19 = 8,698.98/x
  3. Step 3: Cross multiply
    14,987.82x = 20,690.19 × 8,698.98
  4. Step 4: Simplify right side
    14,987.82x = 179,983,549.01
  5. Step 5: Solve for x
    x = 179,983,549.01/14,987.82
  6. Step 6: Final answer
    x = 12,008.65

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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.