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Finding the Fourth Proportional to 12,918.52, 17,824.76 and 7,611.40

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Solution

The fourth proportional to 12,918.52, 17,824.76 and 7,611.40 is: 10,502.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.52 : 17,824.76 = 7,611.40 : x
  2. Step 2: Convert to fraction form
    12,918.52/17,824.76 = 7,611.40/x
  3. Step 3: Cross multiply
    12,918.52x = 17,824.76 × 7,611.40
  4. Step 4: Simplify right side
    12,918.52x = 135,671,378.26
  5. Step 5: Solve for x
    x = 135,671,378.26/12,918.52
  6. Step 6: Final answer
    x = 10,502.08

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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.