Home / 21,155.70-31,731.14-5,574.54

Finding the Fourth Proportional to 21,155.70, 31,731.14 and 5,574.54

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Solution

The fourth proportional to 21,155.70, 31,731.14 and 5,574.54 is: 8,361.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.70 : 31,731.14 = 5,574.54 : x
  2. Step 2: Convert to fraction form
    21,155.70/31,731.14 = 5,574.54/x
  3. Step 3: Cross multiply
    21,155.70x = 31,731.14 × 5,574.54
  4. Step 4: Simplify right side
    21,155.70x = 176,886,509.18
  5. Step 5: Solve for x
    x = 176,886,509.18/21,155.70
  6. Step 6: Final answer
    x = 8,361.17

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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.