Home / 21,087.76-31,628.02-7,236.76

Finding the Fourth Proportional to 21,087.76, 31,628.02 and 7,236.76

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Solution

The fourth proportional to 21,087.76, 31,628.02 and 7,236.76 is: 10,853.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.76 : 31,628.02 = 7,236.76 : x
  2. Step 2: Convert to fraction form
    21,087.76/31,628.02 = 7,236.76/x
  3. Step 3: Cross multiply
    21,087.76x = 31,628.02 × 7,236.76
  4. Step 4: Simplify right side
    21,087.76x = 228,884,390.02
  5. Step 5: Solve for x
    x = 228,884,390.02/21,087.76
  6. Step 6: Final answer
    x = 10,853.90

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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.