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Finding the Fourth Proportional to 12,506.60, 18,759.95 and 5,111.08

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Solution

The fourth proportional to 12,506.60, 18,759.95 and 5,111.08 is: 7,666.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,506.60 : 18,759.95 = 5,111.08 : x
  2. Step 2: Convert to fraction form
    12,506.60/18,759.95 = 5,111.08/x
  3. Step 3: Cross multiply
    12,506.60x = 18,759.95 × 5,111.08
  4. Step 4: Simplify right side
    12,506.60x = 95,883,605.25
  5. Step 5: Solve for x
    x = 95,883,605.25/12,506.60
  6. Step 6: Final answer
    x = 7,666.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.