Home / 12,642.61-18,966.99-4,209.09

Finding the Fourth Proportional to 12,642.61, 18,966.99 and 4,209.09

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Solution

The fourth proportional to 12,642.61, 18,966.99 and 4,209.09 is: 6,314.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.61 : 18,966.99 = 4,209.09 : x
  2. Step 2: Convert to fraction form
    12,642.61/18,966.99 = 4,209.09/x
  3. Step 3: Cross multiply
    12,642.61x = 18,966.99 × 4,209.09
  4. Step 4: Simplify right side
    12,642.61x = 79,833,807.45
  5. Step 5: Solve for x
    x = 79,833,807.45/12,642.61
  6. Step 6: Final answer
    x = 6,314.66

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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.