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Finding the Fourth Proportional to 18,866.88, 28,308.12 and 9,501.87

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Solution

The fourth proportional to 18,866.88, 28,308.12 and 9,501.87 is: 14,256.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.88 : 28,308.12 = 9,501.87 : x
  2. Step 2: Convert to fraction form
    18,866.88/28,308.12 = 9,501.87/x
  3. Step 3: Cross multiply
    18,866.88x = 28,308.12 × 9,501.87
  4. Step 4: Simplify right side
    18,866.88x = 268,980,076.18
  5. Step 5: Solve for x
    x = 268,980,076.18/18,866.88
  6. Step 6: Final answer
    x = 14,256.73

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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.