Home / 14,129.57-21,145.30-8,790.56

Finding the Fourth Proportional to 14,129.57, 21,145.30 and 8,790.56

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Solution

The fourth proportional to 14,129.57, 21,145.30 and 8,790.56 is: 13,155.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,129.57 : 21,145.30 = 8,790.56 : x
  2. Step 2: Convert to fraction form
    14,129.57/21,145.30 = 8,790.56/x
  3. Step 3: Cross multiply
    14,129.57x = 21,145.30 × 8,790.56
  4. Step 4: Simplify right side
    14,129.57x = 185,878,878.69
  5. Step 5: Solve for x
    x = 185,878,878.69/14,129.57
  6. Step 6: Final answer
    x = 13,155.31

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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.