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Finding the Fourth Proportional to 19,321, 26,663.10 and 11,363.56

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Solution

The fourth proportional to 19,321, 26,663.10 and 11,363.56 is: 15,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,321 : 26,663.10 = 11,363.56 : x
  2. Step 2: Convert to fraction form
    19,321/26,663.10 = 11,363.56/x
  3. Step 3: Cross multiply
    19,321x = 26,663.10 × 11,363.56
  4. Step 4: Simplify right side
    19,321x = 302,987,736.64
  5. Step 5: Solve for x
    x = 302,987,736.64/19,321
  6. Step 6: Final answer
    x = 15,681.78

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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.