Home / 21,369.60-29,486.40-11,937.60

Finding the Fourth Proportional to 21,369.60, 29,486.40 and 11,937.60

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Solution

The fourth proportional to 21,369.60, 29,486.40 and 11,937.60 is: 16,471.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,369.60 : 29,486.40 = 11,937.60 : x
  2. Step 2: Convert to fraction form
    21,369.60/29,486.40 = 11,937.60/x
  3. Step 3: Cross multiply
    21,369.60x = 29,486.40 × 11,937.60
  4. Step 4: Simplify right side
    21,369.60x = 351,996,848.64
  5. Step 5: Solve for x
    x = 351,996,848.64/21,369.60
  6. Step 6: Final answer
    x = 16,471.85

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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.