Home / 13,215.19-18,237.51-7,247.09

Finding the Fourth Proportional to 13,215.19, 18,237.51 and 7,247.09

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Solution

The fourth proportional to 13,215.19, 18,237.51 and 7,247.09 is: 10,001.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.19 : 18,237.51 = 7,247.09 : x
  2. Step 2: Convert to fraction form
    13,215.19/18,237.51 = 7,247.09/x
  3. Step 3: Cross multiply
    13,215.19x = 18,237.51 × 7,247.09
  4. Step 4: Simplify right side
    13,215.19x = 132,168,876.35
  5. Step 5: Solve for x
    x = 132,168,876.35/13,215.19
  6. Step 6: Final answer
    x = 10,001.28

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Half scale
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Double scale
Find fourth proportional to 13,216.19, 18,238.89 and 7,248.09
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.