Home / 28,358.14-39,132.57-16,420.63

Finding the Fourth Proportional to 28,358.14, 39,132.57 and 16,420.63

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Solution

The fourth proportional to 28,358.14, 39,132.57 and 16,420.63 is: 22,659.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.14 : 39,132.57 = 16,420.63 : x
  2. Step 2: Convert to fraction form
    28,358.14/39,132.57 = 16,420.63/x
  3. Step 3: Cross multiply
    28,358.14x = 39,132.57 × 16,420.63
  4. Step 4: Simplify right side
    28,358.14x = 642,581,452.92
  5. Step 5: Solve for x
    x = 642,581,452.92/28,358.14
  6. Step 6: Final answer
    x = 22,659.51

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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.