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Finding the Fourth Proportional to 18,715.59, 28,055.97 and 9,829.08

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Solution

The fourth proportional to 18,715.59, 28,055.97 and 9,829.08 is: 14,734.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.59 : 28,055.97 = 9,829.08 : x
  2. Step 2: Convert to fraction form
    18,715.59/28,055.97 = 9,829.08/x
  3. Step 3: Cross multiply
    18,715.59x = 28,055.97 × 9,829.08
  4. Step 4: Simplify right side
    18,715.59x = 275,764,373.61
  5. Step 5: Solve for x
    x = 275,764,373.61/18,715.59
  6. Step 6: Final answer
    x = 14,734.47

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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.