Home / 13,225.58-18,251.88-7,920.28

Finding the Fourth Proportional to 13,225.58, 18,251.88 and 7,920.28

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Solution

The fourth proportional to 13,225.58, 18,251.88 and 7,920.28 is: 10,930.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,225.58 : 18,251.88 = 7,920.28 : x
  2. Step 2: Convert to fraction form
    13,225.58/18,251.88 = 7,920.28/x
  3. Step 3: Cross multiply
    13,225.58x = 18,251.88 × 7,920.28
  4. Step 4: Simplify right side
    13,225.58x = 144,560,037.79
  5. Step 5: Solve for x
    x = 144,560,037.79/13,225.58
  6. Step 6: Final answer
    x = 10,930.34

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Half scale
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Double scale
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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.