Home / 21,900.90-30,206.58-18,881.22

Finding the Fourth Proportional to 21,900.90, 30,206.58 and 18,881.22

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Solution

The fourth proportional to 21,900.90, 30,206.58 and 18,881.22 is: 26,041.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.90 : 30,206.58 = 18,881.22 : x
  2. Step 2: Convert to fraction form
    21,900.90/30,206.58 = 18,881.22/x
  3. Step 3: Cross multiply
    21,900.90x = 30,206.58 × 18,881.22
  4. Step 4: Simplify right side
    21,900.90x = 570,337,082.43
  5. Step 5: Solve for x
    x = 570,337,082.43/21,900.90
  6. Step 6: Final answer
    x = 26,041.72

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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.