Home / 21,899.57-30,221.91-12,954.74

Finding the Fourth Proportional to 21,899.57, 30,221.91 and 12,954.74

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Solution

The fourth proportional to 21,899.57, 30,221.91 and 12,954.74 is: 17,877.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.57 : 30,221.91 = 12,954.74 : x
  2. Step 2: Convert to fraction form
    21,899.57/30,221.91 = 12,954.74/x
  3. Step 3: Cross multiply
    21,899.57x = 30,221.91 × 12,954.74
  4. Step 4: Simplify right side
    21,899.57x = 391,516,835.24
  5. Step 5: Solve for x
    x = 391,516,835.24/21,899.57
  6. Step 6: Final answer
    x = 17,877.84

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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.