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Finding the Fourth Proportional to 12,788.55, 17,643.02 and 9,243.99

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Solution

The fourth proportional to 12,788.55, 17,643.02 and 9,243.99 is: 12,752.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788.55 : 17,643.02 = 9,243.99 : x
  2. Step 2: Convert to fraction form
    12,788.55/17,643.02 = 9,243.99/x
  3. Step 3: Cross multiply
    12,788.55x = 17,643.02 × 9,243.99
  4. Step 4: Simplify right side
    12,788.55x = 163,091,854.23
  5. Step 5: Solve for x
    x = 163,091,854.23/12,788.55
  6. Step 6: Final answer
    x = 12,752.96

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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.