Home / 21,389.57-29,529.26-12,893.88

Finding the Fourth Proportional to 21,389.57, 29,529.26 and 12,893.88

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Solution

The fourth proportional to 21,389.57, 29,529.26 and 12,893.88 is: 17,800.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.57 : 29,529.26 = 12,893.88 : x
  2. Step 2: Convert to fraction form
    21,389.57/29,529.26 = 12,893.88/x
  3. Step 3: Cross multiply
    21,389.57x = 29,529.26 × 12,893.88
  4. Step 4: Simplify right side
    21,389.57x = 380,746,829.55
  5. Step 5: Solve for x
    x = 380,746,829.55/21,389.57
  6. Step 6: Final answer
    x = 17,800.58

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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.