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Finding the Fourth Proportional to 12,858.32, 17,744.64 and 7,269.20

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Solution

The fourth proportional to 12,858.32, 17,744.64 and 7,269.20 is: 10,031.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.32 : 17,744.64 = 7,269.20 : x
  2. Step 2: Convert to fraction form
    12,858.32/17,744.64 = 7,269.20/x
  3. Step 3: Cross multiply
    12,858.32x = 17,744.64 × 7,269.20
  4. Step 4: Simplify right side
    12,858.32x = 128,989,337.09
  5. Step 5: Solve for x
    x = 128,989,337.09/12,858.32
  6. Step 6: Final answer
    x = 10,031.59

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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.