Home / 20,634.81-28,501.80-15,912.10

Finding the Fourth Proportional to 20,634.81, 28,501.80 and 15,912.10

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Solution

The fourth proportional to 20,634.81, 28,501.80 and 15,912.10 is: 21,978.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.81 : 28,501.80 = 15,912.10 : x
  2. Step 2: Convert to fraction form
    20,634.81/28,501.80 = 15,912.10/x
  3. Step 3: Cross multiply
    20,634.81x = 28,501.80 × 15,912.10
  4. Step 4: Simplify right side
    20,634.81x = 453,523,491.78
  5. Step 5: Solve for x
    x = 453,523,491.78/20,634.81
  6. Step 6: Final answer
    x = 21,978.56

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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.