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Finding the Fourth Proportional to 12,235.79, 16,885.35 and 6,646.79

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Solution

The fourth proportional to 12,235.79, 16,885.35 and 6,646.79 is: 9,172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,235.79 : 16,885.35 = 6,646.79 : x
  2. Step 2: Convert to fraction form
    12,235.79/16,885.35 = 6,646.79/x
  3. Step 3: Cross multiply
    12,235.79x = 16,885.35 × 6,646.79
  4. Step 4: Simplify right side
    12,235.79x = 112,233,291.10
  5. Step 5: Solve for x
    x = 112,233,291.10/12,235.79
  6. Step 6: Final answer
    x = 9,172.55

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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.