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Finding the Fourth Proportional to 28,688.80, 43,032.84 and 7,912.12

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Solution

The fourth proportional to 28,688.80, 43,032.84 and 7,912.12 is: 11,868.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,688.80 : 43,032.84 = 7,912.12 : x
  2. Step 2: Convert to fraction form
    28,688.80/43,032.84 = 7,912.12/x
  3. Step 3: Cross multiply
    28,688.80x = 43,032.84 × 7,912.12
  4. Step 4: Simplify right side
    28,688.80x = 340,480,994.02
  5. Step 5: Solve for x
    x = 340,480,994.02/28,688.80
  6. Step 6: Final answer
    x = 11,868.08

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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.