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Finding the Fourth Proportional to 18,685.74, 28,037.10 and 6,999.84

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Solution

The fourth proportional to 18,685.74, 28,037.10 and 6,999.84 is: 10,502.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.74 : 28,037.10 = 6,999.84 : x
  2. Step 2: Convert to fraction form
    18,685.74/28,037.10 = 6,999.84/x
  3. Step 3: Cross multiply
    18,685.74x = 28,037.10 × 6,999.84
  4. Step 4: Simplify right side
    18,685.74x = 196,255,214.06
  5. Step 5: Solve for x
    x = 196,255,214.06/18,685.74
  6. Step 6: Final answer
    x = 10,502.94

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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.