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Finding the Fourth Proportional to 10,890.60, 16,335.90 and 10,813.80

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Solution

The fourth proportional to 10,890.60, 16,335.90 and 10,813.80 is: 16,220.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.60 : 16,335.90 = 10,813.80 : x
  2. Step 2: Convert to fraction form
    10,890.60/16,335.90 = 10,813.80/x
  3. Step 3: Cross multiply
    10,890.60x = 16,335.90 × 10,813.80
  4. Step 4: Simplify right side
    10,890.60x = 176,653,155.42
  5. Step 5: Solve for x
    x = 176,653,155.42/10,890.60
  6. Step 6: Final answer
    x = 16,220.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.