Home / 20,710.69-28,580.75-11,279.25

Finding the Fourth Proportional to 20,710.69, 28,580.75 and 11,279.25

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Solution

The fourth proportional to 20,710.69, 28,580.75 and 11,279.25 is: 15,565.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.69 : 28,580.75 = 11,279.25 : x
  2. Step 2: Convert to fraction form
    20,710.69/28,580.75 = 11,279.25/x
  3. Step 3: Cross multiply
    20,710.69x = 28,580.75 × 11,279.25
  4. Step 4: Simplify right side
    20,710.69x = 322,369,410.34
  5. Step 5: Solve for x
    x = 322,369,410.34/20,710.69
  6. Step 6: Final answer
    x = 15,565.37

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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.