Home / 19,661.94-29,487.65-13,420.89

Finding the Fourth Proportional to 19,661.94, 29,487.65 and 13,420.89

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Solution

The fourth proportional to 19,661.94, 29,487.65 and 13,420.89 is: 20,127.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,661.94 : 29,487.65 = 13,420.89 : x
  2. Step 2: Convert to fraction form
    19,661.94/29,487.65 = 13,420.89/x
  3. Step 3: Cross multiply
    19,661.94x = 29,487.65 × 13,420.89
  4. Step 4: Simplify right side
    19,661.94x = 395,750,439.90
  5. Step 5: Solve for x
    x = 395,750,439.90/19,661.94
  6. Step 6: Final answer
    x = 20,127.74

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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.