Home / 20,854.48-28,778.06-11,901.64

Finding the Fourth Proportional to 20,854.48, 28,778.06 and 11,901.64

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Solution

The fourth proportional to 20,854.48, 28,778.06 and 11,901.64 is: 16,423.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.48 : 28,778.06 = 11,901.64 : x
  2. Step 2: Convert to fraction form
    20,854.48/28,778.06 = 11,901.64/x
  3. Step 3: Cross multiply
    20,854.48x = 28,778.06 × 11,901.64
  4. Step 4: Simplify right side
    20,854.48x = 342,506,110.02
  5. Step 5: Solve for x
    x = 342,506,110.02/20,854.48
  6. Step 6: Final answer
    x = 16,423.62

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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.