Home / 21,821.56-30,113.76-11,885.56

Finding the Fourth Proportional to 21,821.56, 30,113.76 and 11,885.56

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Solution

The fourth proportional to 21,821.56, 30,113.76 and 11,885.56 is: 16,402.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.56 : 30,113.76 = 11,885.56 : x
  2. Step 2: Convert to fraction form
    21,821.56/30,113.76 = 11,885.56/x
  3. Step 3: Cross multiply
    21,821.56x = 30,113.76 × 11,885.56
  4. Step 4: Simplify right side
    21,821.56x = 357,918,946.88
  5. Step 5: Solve for x
    x = 357,918,946.88/21,821.56
  6. Step 6: Final answer
    x = 16,402.08

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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.