Home / 28,351.08-39,129.28-16,421.64

Finding the Fourth Proportional to 28,351.08, 39,129.28 and 16,421.64

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Solution

The fourth proportional to 28,351.08, 39,129.28 and 16,421.64 is: 22,664.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,351.08 : 39,129.28 = 16,421.64 : x
  2. Step 2: Convert to fraction form
    28,351.08/39,129.28 = 16,421.64/x
  3. Step 3: Cross multiply
    28,351.08x = 39,129.28 × 16,421.64
  4. Step 4: Simplify right side
    28,351.08x = 642,566,949.62
  5. Step 5: Solve for x
    x = 642,566,949.62/28,351.08
  6. Step 6: Final answer
    x = 22,664.64

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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.