Home / 21,011.69-28,994.82-11,580.32

Finding the Fourth Proportional to 21,011.69, 28,994.82 and 11,580.32

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Solution

The fourth proportional to 21,011.69, 28,994.82 and 11,580.32 is: 15,980.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.69 : 28,994.82 = 11,580.32 : x
  2. Step 2: Convert to fraction form
    21,011.69/28,994.82 = 11,580.32/x
  3. Step 3: Cross multiply
    21,011.69x = 28,994.82 × 11,580.32
  4. Step 4: Simplify right side
    21,011.69x = 335,769,293.94
  5. Step 5: Solve for x
    x = 335,769,293.94/21,011.69
  6. Step 6: Final answer
    x = 15,980.12

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Half scale
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Double scale
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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.