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Finding the Fourth Proportional to 12,643.79, 17,449.63 and 7,267.01

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Solution

The fourth proportional to 12,643.79, 17,449.63 and 7,267.01 is: 10,029.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.79 : 17,449.63 = 7,267.01 : x
  2. Step 2: Convert to fraction form
    12,643.79/17,449.63 = 7,267.01/x
  3. Step 3: Cross multiply
    12,643.79x = 17,449.63 × 7,267.01
  4. Step 4: Simplify right side
    12,643.79x = 126,806,530.29
  5. Step 5: Solve for x
    x = 126,806,530.29/12,643.79
  6. Step 6: Final answer
    x = 10,029.16

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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.