Home / 13,206.84-18,225.40-7,238.76

Finding the Fourth Proportional to 13,206.84, 18,225.40 and 7,238.76

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Solution

The fourth proportional to 13,206.84, 18,225.40 and 7,238.76 is: 9,989.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,206.84 : 18,225.40 = 7,238.76 : x
  2. Step 2: Convert to fraction form
    13,206.84/18,225.40 = 7,238.76/x
  3. Step 3: Cross multiply
    13,206.84x = 18,225.40 × 7,238.76
  4. Step 4: Simplify right side
    13,206.84x = 131,929,296.50
  5. Step 5: Solve for x
    x = 131,929,296.50/13,206.84
  6. Step 6: Final answer
    x = 9,989.47

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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.