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Finding the Fourth Proportional to 12,666.60, 18,999.90 and 9,167.40

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Solution

The fourth proportional to 12,666.60, 18,999.90 and 9,167.40 is: 13,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.60 : 18,999.90 = 9,167.40 : x
  2. Step 2: Convert to fraction form
    12,666.60/18,999.90 = 9,167.40/x
  3. Step 3: Cross multiply
    12,666.60x = 18,999.90 × 9,167.40
  4. Step 4: Simplify right side
    12,666.60x = 174,179,683.26
  5. Step 5: Solve for x
    x = 174,179,683.26/12,666.60
  6. Step 6: Final answer
    x = 13,751.10

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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.