Home / 21,565.79-29,748.60-12,949.77

Finding the Fourth Proportional to 21,565.79, 29,748.60 and 12,949.77

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Solution

The fourth proportional to 21,565.79, 29,748.60 and 12,949.77 is: 17,863.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,565.79 : 29,748.60 = 12,949.77 : x
  2. Step 2: Convert to fraction form
    21,565.79/29,748.60 = 12,949.77/x
  3. Step 3: Cross multiply
    21,565.79x = 29,748.60 × 12,949.77
  4. Step 4: Simplify right side
    21,565.79x = 385,237,527.82
  5. Step 5: Solve for x
    x = 385,237,527.82/21,565.79
  6. Step 6: Final answer
    x = 17,863.37

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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.