Home / 28,412.42-39,209.13-15,665.81

Finding the Fourth Proportional to 28,412.42, 39,209.13 and 15,665.81

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Solution

The fourth proportional to 28,412.42, 39,209.13 and 15,665.81 is: 21,618.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.42 : 39,209.13 = 15,665.81 : x
  2. Step 2: Convert to fraction form
    28,412.42/39,209.13 = 15,665.81/x
  3. Step 3: Cross multiply
    28,412.42x = 39,209.13 × 15,665.81
  4. Step 4: Simplify right side
    28,412.42x = 614,242,780.85
  5. Step 5: Solve for x
    x = 614,242,780.85/28,412.42
  6. Step 6: Final answer
    x = 21,618.81

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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.