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Finding the Fourth Proportional to 18,723.64, 28,088.34 and 7,037.68

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Solution

The fourth proportional to 18,723.64, 28,088.34 and 7,037.68 is: 10,557.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.64 : 28,088.34 = 7,037.68 : x
  2. Step 2: Convert to fraction form
    18,723.64/28,088.34 = 7,037.68/x
  3. Step 3: Cross multiply
    18,723.64x = 28,088.34 × 7,037.68
  4. Step 4: Simplify right side
    18,723.64x = 197,676,748.65
  5. Step 5: Solve for x
    x = 197,676,748.65/18,723.64
  6. Step 6: Final answer
    x = 10,557.60

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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.