Home / 15,339.80-21,162.31-9,670.07

Finding the Fourth Proportional to 15,339.80, 21,162.31 and 9,670.07

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Solution

The fourth proportional to 15,339.80, 21,162.31 and 9,670.07 is: 13,340.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,339.80 : 21,162.31 = 9,670.07 : x
  2. Step 2: Convert to fraction form
    15,339.80/21,162.31 = 9,670.07/x
  3. Step 3: Cross multiply
    15,339.80x = 21,162.31 × 9,670.07
  4. Step 4: Simplify right side
    15,339.80x = 204,640,889.07
  5. Step 5: Solve for x
    x = 204,640,889.07/15,339.80
  6. Step 6: Final answer
    x = 13,340.52

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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.