Home / 21,082.40-31,620.02-7,040.84

Finding the Fourth Proportional to 21,082.40, 31,620.02 and 7,040.84

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Solution

The fourth proportional to 21,082.40, 31,620.02 and 7,040.84 is: 10,560.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,082.40 : 31,620.02 = 7,040.84 : x
  2. Step 2: Convert to fraction form
    21,082.40/31,620.02 = 7,040.84/x
  3. Step 3: Cross multiply
    21,082.40x = 31,620.02 × 7,040.84
  4. Step 4: Simplify right side
    21,082.40x = 222,631,598.27
  5. Step 5: Solve for x
    x = 222,631,598.27/21,082.40
  6. Step 6: Final answer
    x = 10,560.07

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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.