Home / 13,215.25-18,237.45-7,247.17

Finding the Fourth Proportional to 13,215.25, 18,237.45 and 7,247.17

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Solution

The fourth proportional to 13,215.25, 18,237.45 and 7,247.17 is: 10,001.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.25 : 18,237.45 = 7,247.17 : x
  2. Step 2: Convert to fraction form
    13,215.25/18,237.45 = 7,247.17/x
  3. Step 3: Cross multiply
    13,215.25x = 18,237.45 × 7,247.17
  4. Step 4: Simplify right side
    13,215.25x = 132,169,950.49
  5. Step 5: Solve for x
    x = 132,169,950.49/13,215.25
  6. Step 6: Final answer
    x = 10,001.32

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Half scale
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Double scale
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Similar ratio
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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.