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Finding the Fourth Proportional to 28,775.77, 43,152.31 and 13,980.31

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Solution

The fourth proportional to 28,775.77, 43,152.31 and 13,980.31 is: 20,964.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.77 : 43,152.31 = 13,980.31 : x
  2. Step 2: Convert to fraction form
    28,775.77/43,152.31 = 13,980.31/x
  3. Step 3: Cross multiply
    28,775.77x = 43,152.31 × 13,980.31
  4. Step 4: Simplify right side
    28,775.77x = 603,282,671.02
  5. Step 5: Solve for x
    x = 603,282,671.02/28,775.77
  6. Step 6: Final answer
    x = 20,964.95

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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.