Home / 13,746.30-20,619.45-12,666.30

Finding the Fourth Proportional to 13,746.30, 20,619.45 and 12,666.30

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Solution

The fourth proportional to 13,746.30, 20,619.45 and 12,666.30 is: 18,999.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,746.30 : 20,619.45 = 12,666.30 : x
  2. Step 2: Convert to fraction form
    13,746.30/20,619.45 = 12,666.30/x
  3. Step 3: Cross multiply
    13,746.30x = 20,619.45 × 12,666.30
  4. Step 4: Simplify right side
    13,746.30x = 261,172,139.54
  5. Step 5: Solve for x
    x = 261,172,139.54/13,746.30
  6. Step 6: Final answer
    x = 18,999.45

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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.