Home / 21,171.78-29,211.18-16,681.62

Finding the Fourth Proportional to 21,171.78, 29,211.18 and 16,681.62

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Solution

The fourth proportional to 21,171.78, 29,211.18 and 16,681.62 is: 23,016.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.78 : 29,211.18 = 16,681.62 : x
  2. Step 2: Convert to fraction form
    21,171.78/29,211.18 = 16,681.62/x
  3. Step 3: Cross multiply
    21,171.78x = 29,211.18 × 16,681.62
  4. Step 4: Simplify right side
    21,171.78x = 487,289,804.51
  5. Step 5: Solve for x
    x = 487,289,804.51/21,171.78
  6. Step 6: Final answer
    x = 23,016.01

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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.