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Finding the Fourth Proportional to 28,410.48, 42,612.84 and 8,689.20

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Solution

The fourth proportional to 28,410.48, 42,612.84 and 8,689.20 is: 13,032.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,410.48 : 42,612.84 = 8,689.20 : x
  2. Step 2: Convert to fraction form
    28,410.48/42,612.84 = 8,689.20/x
  3. Step 3: Cross multiply
    28,410.48x = 42,612.84 × 8,689.20
  4. Step 4: Simplify right side
    28,410.48x = 370,271,489.33
  5. Step 5: Solve for x
    x = 370,271,489.33/28,410.48
  6. Step 6: Final answer
    x = 13,032.92

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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.