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Finding the Fourth Proportional to 28,775.76, 39,701.04 and 16,830.64

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Solution

The fourth proportional to 28,775.76, 39,701.04 and 16,830.64 is: 23,220.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.76 : 39,701.04 = 16,830.64 : x
  2. Step 2: Convert to fraction form
    28,775.76/39,701.04 = 16,830.64/x
  3. Step 3: Cross multiply
    28,775.76x = 39,701.04 × 16,830.64
  4. Step 4: Simplify right side
    28,775.76x = 668,193,911.87
  5. Step 5: Solve for x
    x = 668,193,911.87/28,775.76
  6. Step 6: Final answer
    x = 23,220.72

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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.