Home / 21,622.21-29,848.71-12,668.47

Finding the Fourth Proportional to 21,622.21, 29,848.71 and 12,668.47

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Solution

The fourth proportional to 21,622.21, 29,848.71 and 12,668.47 is: 17,488.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.21 : 29,848.71 = 12,668.47 : x
  2. Step 2: Convert to fraction form
    21,622.21/29,848.71 = 12,668.47/x
  3. Step 3: Cross multiply
    21,622.21x = 29,848.71 × 12,668.47
  4. Step 4: Simplify right side
    21,622.21x = 378,137,487.17
  5. Step 5: Solve for x
    x = 378,137,487.17/21,622.21
  6. Step 6: Final answer
    x = 17,488.38

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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.