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Finding the Fourth Proportional to 18,815.60, 28,210.08 and 9,448.88

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Solution

The fourth proportional to 18,815.60, 28,210.08 and 9,448.88 is: 14,166.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.60 : 28,210.08 = 9,448.88 : x
  2. Step 2: Convert to fraction form
    18,815.60/28,210.08 = 9,448.88/x
  3. Step 3: Cross multiply
    18,815.60x = 28,210.08 × 9,448.88
  4. Step 4: Simplify right side
    18,815.60x = 266,553,660.71
  5. Step 5: Solve for x
    x = 266,553,660.71/18,815.60
  6. Step 6: Final answer
    x = 14,166.63

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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.