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Finding the Fourth Proportional to 13,038.40, 17,992.16 and 7,449.28

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Solution

The fourth proportional to 13,038.40, 17,992.16 and 7,449.28 is: 10,279.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,038.40 : 17,992.16 = 7,449.28 : x
  2. Step 2: Convert to fraction form
    13,038.40/17,992.16 = 7,449.28/x
  3. Step 3: Cross multiply
    13,038.40x = 17,992.16 × 7,449.28
  4. Step 4: Simplify right side
    13,038.40x = 134,028,637.64
  5. Step 5: Solve for x
    x = 134,028,637.64/13,038.40
  6. Step 6: Final answer
    x = 10,279.53

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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.