Home / 28,358.14-39,132.56-16,420.64

Finding the Fourth Proportional to 28,358.14, 39,132.56 and 16,420.64

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Solution

The fourth proportional to 28,358.14, 39,132.56 and 16,420.64 is: 22,659.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.14 : 39,132.56 = 16,420.64 : x
  2. Step 2: Convert to fraction form
    28,358.14/39,132.56 = 16,420.64/x
  3. Step 3: Cross multiply
    28,358.14x = 39,132.56 × 16,420.64
  4. Step 4: Simplify right side
    28,358.14x = 642,581,680.04
  5. Step 5: Solve for x
    x = 642,581,680.04/28,358.14
  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.