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Finding the Fourth Proportional to 9,172.88, 13,752.56 and 7,420.08

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Solution

The fourth proportional to 9,172.88, 13,752.56 and 7,420.08 is: 11,124.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,172.88 : 13,752.56 = 7,420.08 : x
  2. Step 2: Convert to fraction form
    9,172.88/13,752.56 = 7,420.08/x
  3. Step 3: Cross multiply
    9,172.88x = 13,752.56 × 7,420.08
  4. Step 4: Simplify right side
    9,172.88x = 102,045,095.40
  5. Step 5: Solve for x
    x = 102,045,095.40/9,172.88
  6. Step 6: Final answer
    x = 11,124.65

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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.