Home / 19,681.40-27,159.70-10,728.76

Finding the Fourth Proportional to 19,681.40, 27,159.70 and 10,728.76

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Solution

The fourth proportional to 19,681.40, 27,159.70 and 10,728.76 is: 14,805.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,681.40 : 27,159.70 = 10,728.76 : x
  2. Step 2: Convert to fraction form
    19,681.40/27,159.70 = 10,728.76/x
  3. Step 3: Cross multiply
    19,681.40x = 27,159.70 × 10,728.76
  4. Step 4: Simplify right side
    19,681.40x = 291,389,902.97
  5. Step 5: Solve for x
    x = 291,389,902.97/19,681.40
  6. Step 6: Final answer
    x = 14,805.34

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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.