Home / 21,235.04-29,307.12-12,851.68

Finding the Fourth Proportional to 21,235.04, 29,307.12 and 12,851.68

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Solution

The fourth proportional to 21,235.04, 29,307.12 and 12,851.68 is: 17,736.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.04 : 29,307.12 = 12,851.68 : x
  2. Step 2: Convert to fraction form
    21,235.04/29,307.12 = 12,851.68/x
  3. Step 3: Cross multiply
    21,235.04x = 29,307.12 × 12,851.68
  4. Step 4: Simplify right side
    21,235.04x = 376,645,727.96
  5. Step 5: Solve for x
    x = 376,645,727.96/21,235.04
  6. Step 6: Final answer
    x = 17,736.99

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Double scale
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Similar ratio
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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.