Home / 20,438.81-30,644.06-10,424.12

Finding the Fourth Proportional to 20,438.81, 30,644.06 and 10,424.12

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Solution

The fourth proportional to 20,438.81, 30,644.06 and 10,424.12 is: 15,628.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.81 : 30,644.06 = 10,424.12 : x
  2. Step 2: Convert to fraction form
    20,438.81/30,644.06 = 10,424.12/x
  3. Step 3: Cross multiply
    20,438.81x = 30,644.06 × 10,424.12
  4. Step 4: Simplify right side
    20,438.81x = 319,437,283.55
  5. Step 5: Solve for x
    x = 319,437,283.55/20,438.81
  6. Step 6: Final answer
    x = 15,628.96

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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.