Home / 28,800.14-39,742.17-15,878.84

Finding the Fourth Proportional to 28,800.14, 39,742.17 and 15,878.84

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Solution

The fourth proportional to 28,800.14, 39,742.17 and 15,878.84 is: 21,911.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,800.14 : 39,742.17 = 15,878.84 : x
  2. Step 2: Convert to fraction form
    28,800.14/39,742.17 = 15,878.84/x
  3. Step 3: Cross multiply
    28,800.14x = 39,742.17 × 15,878.84
  4. Step 4: Simplify right side
    28,800.14x = 631,059,558.68
  5. Step 5: Solve for x
    x = 631,059,558.68/28,800.14
  6. Step 6: Final answer
    x = 21,911.68

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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.