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Finding the Fourth Proportional to 12,907.20, 17,808.48 and 7,318.08

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Solution

The fourth proportional to 12,907.20, 17,808.48 and 7,318.08 is: 10,096.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,907.20 : 17,808.48 = 7,318.08 : x
  2. Step 2: Convert to fraction form
    12,907.20/17,808.48 = 7,318.08/x
  3. Step 3: Cross multiply
    12,907.20x = 17,808.48 × 7,318.08
  4. Step 4: Simplify right side
    12,907.20x = 130,323,881.32
  5. Step 5: Solve for x
    x = 130,323,881.32/12,907.20
  6. Step 6: Final answer
    x = 10,096.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.