Home / 28,855.51-39,813.73-19,900.15

Finding the Fourth Proportional to 28,855.51, 39,813.73 and 19,900.15

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Solution

The fourth proportional to 28,855.51, 39,813.73 and 19,900.15 is: 27,457.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,855.51 : 39,813.73 = 19,900.15 : x
  2. Step 2: Convert to fraction form
    28,855.51/39,813.73 = 19,900.15/x
  3. Step 3: Cross multiply
    28,855.51x = 39,813.73 × 19,900.15
  4. Step 4: Simplify right side
    28,855.51x = 792,299,199.06
  5. Step 5: Solve for x
    x = 792,299,199.06/28,855.51
  6. Step 6: Final answer
    x = 27,457.47

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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.