Home / 28,731.05-39,626.36-19,661.77

Finding the Fourth Proportional to 28,731.05, 39,626.36 and 19,661.77

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Solution

The fourth proportional to 28,731.05, 39,626.36 and 19,661.77 is: 27,117.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,731.05 : 39,626.36 = 19,661.77 : x
  2. Step 2: Convert to fraction form
    28,731.05/39,626.36 = 19,661.77/x
  3. Step 3: Cross multiply
    28,731.05x = 39,626.36 × 19,661.77
  4. Step 4: Simplify right side
    28,731.05x = 779,124,178.13
  5. Step 5: Solve for x
    x = 779,124,178.13/28,731.05
  6. Step 6: Final answer
    x = 27,117.85

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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.