Home / 21,623.84-29,841.20-13,240.32

Finding the Fourth Proportional to 21,623.84, 29,841.20 and 13,240.32

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Solution

The fourth proportional to 21,623.84, 29,841.20 and 13,240.32 is: 18,271.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,623.84 : 29,841.20 = 13,240.32 : x
  2. Step 2: Convert to fraction form
    21,623.84/29,841.20 = 13,240.32/x
  3. Step 3: Cross multiply
    21,623.84x = 29,841.20 × 13,240.32
  4. Step 4: Simplify right side
    21,623.84x = 395,107,037.18
  5. Step 5: Solve for x
    x = 395,107,037.18/21,623.84
  6. Step 6: Final answer
    x = 18,271.83

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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.