Home / 21,230.76-29,290.97-12,735.63

Finding the Fourth Proportional to 21,230.76, 29,290.97 and 12,735.63

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Solution

The fourth proportional to 21,230.76, 29,290.97 and 12,735.63 is: 17,570.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.76 : 29,290.97 = 12,735.63 : x
  2. Step 2: Convert to fraction form
    21,230.76/29,290.97 = 12,735.63/x
  3. Step 3: Cross multiply
    21,230.76x = 29,290.97 × 12,735.63
  4. Step 4: Simplify right side
    21,230.76x = 373,038,956.26
  5. Step 5: Solve for x
    x = 373,038,956.26/21,230.76
  6. Step 6: Final answer
    x = 17,570.68

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Double scale
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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.