Home / 28,357.34-39,135.38-16,420.88

Finding the Fourth Proportional to 28,357.34, 39,135.38 and 16,420.88

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Solution

The fourth proportional to 28,357.34, 39,135.38 and 16,420.88 is: 22,662.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.34 : 39,135.38 = 16,420.88 : x
  2. Step 2: Convert to fraction form
    28,357.34/39,135.38 = 16,420.88/x
  3. Step 3: Cross multiply
    28,357.34x = 39,135.38 × 16,420.88
  4. Step 4: Simplify right side
    28,357.34x = 642,637,378.73
  5. Step 5: Solve for x
    x = 642,637,378.73/28,357.34
  6. Step 6: Final answer
    x = 22,662.12

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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.