Home / 28,788.80-39,727.20-19,355.84

Finding the Fourth Proportional to 28,788.80, 39,727.20 and 19,355.84

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Solution

The fourth proportional to 28,788.80, 39,727.20 and 19,355.84 is: 26,710.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,788.80 : 39,727.20 = 19,355.84 : x
  2. Step 2: Convert to fraction form
    28,788.80/39,727.20 = 19,355.84/x
  3. Step 3: Cross multiply
    28,788.80x = 39,727.20 × 19,355.84
  4. Step 4: Simplify right side
    28,788.80x = 768,953,326.85
  5. Step 5: Solve for x
    x = 768,953,326.85/28,788.80
  6. Step 6: Final answer
    x = 26,710.16

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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.