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Finding the Fourth Proportional to 28,702.36, 43,035.90 and 9,978.04

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Solution

The fourth proportional to 28,702.36, 43,035.90 and 9,978.04 is: 14,960.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,702.36 : 43,035.90 = 9,978.04 : x
  2. Step 2: Convert to fraction form
    28,702.36/43,035.90 = 9,978.04/x
  3. Step 3: Cross multiply
    28,702.36x = 43,035.90 × 9,978.04
  4. Step 4: Simplify right side
    28,702.36x = 429,413,931.64
  5. Step 5: Solve for x
    x = 429,413,931.64/28,702.36
  6. Step 6: Final answer
    x = 14,960.93

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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.