Home / 20,807.63-28,712.55-11,854.91

Finding the Fourth Proportional to 20,807.63, 28,712.55 and 11,854.91

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Solution

The fourth proportional to 20,807.63, 28,712.55 and 11,854.91 is: 16,358.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.63 : 28,712.55 = 11,854.91 : x
  2. Step 2: Convert to fraction form
    20,807.63/28,712.55 = 11,854.91/x
  3. Step 3: Cross multiply
    20,807.63x = 28,712.55 × 11,854.91
  4. Step 4: Simplify right side
    20,807.63x = 340,384,552.56
  5. Step 5: Solve for x
    x = 340,384,552.56/20,807.63
  6. Step 6: Final answer
    x = 16,358.64

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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.