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Finding the Fourth Proportional to 28,400.84, 42,601.36 and 8,679.31

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Solution

The fourth proportional to 28,400.84, 42,601.36 and 8,679.31 is: 13,019.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400.84 : 42,601.36 = 8,679.31 : x
  2. Step 2: Convert to fraction form
    28,400.84/42,601.36 = 8,679.31/x
  3. Step 3: Cross multiply
    28,400.84x = 42,601.36 × 8,679.31
  4. Step 4: Simplify right side
    28,400.84x = 369,750,537.57
  5. Step 5: Solve for x
    x = 369,750,537.57/28,400.84
  6. Step 6: Final answer
    x = 13,019.00

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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.