Home / 13,139.40-19,709.26-8,725.32

Finding the Fourth Proportional to 13,139.40, 19,709.26 and 8,725.32

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Solution

The fourth proportional to 13,139.40, 19,709.26 and 8,725.32 is: 13,088.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.40 : 19,709.26 = 8,725.32 : x
  2. Step 2: Convert to fraction form
    13,139.40/19,709.26 = 8,725.32/x
  3. Step 3: Cross multiply
    13,139.40x = 19,709.26 × 8,725.32
  4. Step 4: Simplify right side
    13,139.40x = 171,969,600.46
  5. Step 5: Solve for x
    x = 171,969,600.46/13,139.40
  6. Step 6: Final answer
    x = 13,088.09

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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.