Home / 28,433.21-42,686.76-21,864

Finding the Fourth Proportional to 28,433.21, 42,686.76 and 21,864

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Solution

The fourth proportional to 28,433.21, 42,686.76 and 21,864 is: 32,824.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,433.21 : 42,686.76 = 21,864 : x
  2. Step 2: Convert to fraction form
    28,433.21/42,686.76 = 21,864/x
  3. Step 3: Cross multiply
    28,433.21x = 42,686.76 × 21,864
  4. Step 4: Simplify right side
    28,433.21x = 933,303,320.64
  5. Step 5: Solve for x
    x = 933,303,320.64/28,433.21
  6. Step 6: Final answer
    x = 32,824.41

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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.