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Finding the Fourth Proportional to 18,863.60, 28,276.80 and 10,547.60

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Solution

The fourth proportional to 18,863.60, 28,276.80 and 10,547.60 is: 15,811.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.60 : 28,276.80 = 10,547.60 : x
  2. Step 2: Convert to fraction form
    18,863.60/28,276.80 = 10,547.60/x
  3. Step 3: Cross multiply
    18,863.60x = 28,276.80 × 10,547.60
  4. Step 4: Simplify right side
    18,863.60x = 298,252,375.68
  5. Step 5: Solve for x
    x = 298,252,375.68/18,863.60
  6. Step 6: Final answer
    x = 15,811.00

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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.