Home / 21,605.60-29,814.64-12,174.72

Finding the Fourth Proportional to 21,605.60, 29,814.64 and 12,174.72

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Solution

The fourth proportional to 21,605.60, 29,814.64 and 12,174.72 is: 16,800.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.60 : 29,814.64 = 12,174.72 : x
  2. Step 2: Convert to fraction form
    21,605.60/29,814.64 = 12,174.72/x
  3. Step 3: Cross multiply
    21,605.60x = 29,814.64 × 12,174.72
  4. Step 4: Simplify right side
    21,605.60x = 362,984,893.90
  5. Step 5: Solve for x
    x = 362,984,893.90/21,605.60
  6. Step 6: Final answer
    x = 16,800.50

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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.