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Finding the Fourth Proportional to 28,875.88, 43,315.36 and 9,155.98

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Solution

The fourth proportional to 28,875.88, 43,315.36 and 9,155.98 is: 13,734.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,875.88 : 43,315.36 = 9,155.98 : x
  2. Step 2: Convert to fraction form
    28,875.88/43,315.36 = 9,155.98/x
  3. Step 3: Cross multiply
    28,875.88x = 43,315.36 × 9,155.98
  4. Step 4: Simplify right side
    28,875.88x = 396,594,569.85
  5. Step 5: Solve for x
    x = 396,594,569.85/28,875.88
  6. Step 6: Final answer
    x = 13,734.46

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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.