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Finding the Fourth Proportional to 15,498, 21,443.54 and 13,512.69

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Solution

The fourth proportional to 15,498, 21,443.54 and 13,512.69 is: 18,696.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,498 : 21,443.54 = 13,512.69 : x
  2. Step 2: Convert to fraction form
    15,498/21,443.54 = 13,512.69/x
  3. Step 3: Cross multiply
    15,498x = 21,443.54 × 13,512.69
  4. Step 4: Simplify right side
    15,498x = 289,759,840.96
  5. Step 5: Solve for x
    x = 289,759,840.96/15,498
  6. Step 6: Final answer
    x = 18,696.60

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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.