Home / 28,412.68-39,210.42-15,836.68

Finding the Fourth Proportional to 28,412.68, 39,210.42 and 15,836.68

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Solution

The fourth proportional to 28,412.68, 39,210.42 and 15,836.68 is: 21,855.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.68 : 39,210.42 = 15,836.68 : x
  2. Step 2: Convert to fraction form
    28,412.68/39,210.42 = 15,836.68/x
  3. Step 3: Cross multiply
    28,412.68x = 39,210.42 × 15,836.68
  4. Step 4: Simplify right side
    28,412.68x = 620,962,874.21
  5. Step 5: Solve for x
    x = 620,962,874.21/28,412.68
  6. Step 6: Final answer
    x = 21,855.13

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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.