Home / 15,345.24-21,170.16-9,678.06

Finding the Fourth Proportional to 15,345.24, 21,170.16 and 9,678.06

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Solution

The fourth proportional to 15,345.24, 21,170.16 and 9,678.06 is: 13,351.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.24 : 21,170.16 = 9,678.06 : x
  2. Step 2: Convert to fraction form
    15,345.24/21,170.16 = 9,678.06/x
  3. Step 3: Cross multiply
    15,345.24x = 21,170.16 × 9,678.06
  4. Step 4: Simplify right side
    15,345.24x = 204,886,078.69
  5. Step 5: Solve for x
    x = 204,886,078.69/15,345.24
  6. Step 6: Final answer
    x = 13,351.77

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Half scale
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Double scale
Find fourth proportional to 15,346.24, 21,171.54 and 9,679.06
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.