Home / 21,216.47-31,820.60-20,162.76

Finding the Fourth Proportional to 21,216.47, 31,820.60 and 20,162.76

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Solution

The fourth proportional to 21,216.47, 31,820.60 and 20,162.76 is: 30,240.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.47 : 31,820.60 = 20,162.76 : x
  2. Step 2: Convert to fraction form
    21,216.47/31,820.60 = 20,162.76/x
  3. Step 3: Cross multiply
    21,216.47x = 31,820.60 × 20,162.76
  4. Step 4: Simplify right side
    21,216.47x = 641,590,938.52
  5. Step 5: Solve for x
    x = 641,590,938.52/21,216.47
  6. Step 6: Final answer
    x = 30,240.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.