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Finding the Fourth Proportional to 14,985.69, 20,679.96 and 8,271.96

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Solution

The fourth proportional to 14,985.69, 20,679.96 and 8,271.96 is: 11,415.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,985.69 : 20,679.96 = 8,271.96 : x
  2. Step 2: Convert to fraction form
    14,985.69/20,679.96 = 8,271.96/x
  3. Step 3: Cross multiply
    14,985.69x = 20,679.96 × 8,271.96
  4. Step 4: Simplify right side
    14,985.69x = 171,063,801.92
  5. Step 5: Solve for x
    x = 171,063,801.92/14,985.69
  6. Step 6: Final answer
    x = 11,415.14

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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.