Home / 28,357.08-39,135.04-16,420.63

Finding the Fourth Proportional to 28,357.08, 39,135.04 and 16,420.63

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Solution

The fourth proportional to 28,357.08, 39,135.04 and 16,420.63 is: 22,661.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.08 : 39,135.04 = 16,420.63 : x
  2. Step 2: Convert to fraction form
    28,357.08/39,135.04 = 16,420.63/x
  3. Step 3: Cross multiply
    28,357.08x = 39,135.04 × 16,420.63
  4. Step 4: Simplify right side
    28,357.08x = 642,621,929.77
  5. Step 5: Solve for x
    x = 642,621,929.77/28,357.08
  6. Step 6: Final answer
    x = 22,661.78

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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.