Home / 21,971.08-30,321.95-12,412.72

Finding the Fourth Proportional to 21,971.08, 30,321.95 and 12,412.72

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Solution

The fourth proportional to 21,971.08, 30,321.95 and 12,412.72 is: 17,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.08 : 30,321.95 = 12,412.72 : x
  2. Step 2: Convert to fraction form
    21,971.08/30,321.95 = 12,412.72/x
  3. Step 3: Cross multiply
    21,971.08x = 30,321.95 × 12,412.72
  4. Step 4: Simplify right side
    21,971.08x = 376,377,723.59
  5. Step 5: Solve for x
    x = 376,377,723.59/21,971.08
  6. Step 6: Final answer
    x = 17,130.60

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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.