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Finding the Fourth Proportional to 18,364.56, 27,509.88 and 8,490.24

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Solution

The fourth proportional to 18,364.56, 27,509.88 and 8,490.24 is: 12,718.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,364.56 : 27,509.88 = 8,490.24 : x
  2. Step 2: Convert to fraction form
    18,364.56/27,509.88 = 8,490.24/x
  3. Step 3: Cross multiply
    18,364.56x = 27,509.88 × 8,490.24
  4. Step 4: Simplify right side
    18,364.56x = 233,565,483.57
  5. Step 5: Solve for x
    x = 233,565,483.57/18,364.56
  6. Step 6: Final answer
    x = 12,718.27

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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.