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Finding the Fourth Proportional to 28,807.67, 43,211.45 and 11,265.20

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Solution

The fourth proportional to 28,807.67, 43,211.45 and 11,265.20 is: 16,897.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807.67 : 43,211.45 = 11,265.20 : x
  2. Step 2: Convert to fraction form
    28,807.67/43,211.45 = 11,265.20/x
  3. Step 3: Cross multiply
    28,807.67x = 43,211.45 × 11,265.20
  4. Step 4: Simplify right side
    28,807.67x = 486,785,354.16
  5. Step 5: Solve for x
    x = 486,785,354.16/28,807.67
  6. Step 6: Final answer
    x = 16,897.77

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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.