Home / 13,529.74-18,671.70-8,221.36

Finding the Fourth Proportional to 13,529.74, 18,671.70 and 8,221.36

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Solution

The fourth proportional to 13,529.74, 18,671.70 and 8,221.36 is: 11,345.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,529.74 : 18,671.70 = 8,221.36 : x
  2. Step 2: Convert to fraction form
    13,529.74/18,671.70 = 8,221.36/x
  3. Step 3: Cross multiply
    13,529.74x = 18,671.70 × 8,221.36
  4. Step 4: Simplify right side
    13,529.74x = 153,506,767.51
  5. Step 5: Solve for x
    x = 153,506,767.51/13,529.74
  6. Step 6: Final answer
    x = 11,345.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.