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Finding the Fourth Proportional to 51,579.84, 77,353.58 and 19,987.71

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Solution

The fourth proportional to 51,579.84, 77,353.58 and 19,987.71 is: 29,975.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,579.84 : 77,353.58 = 19,987.71 : x
  2. Step 2: Convert to fraction form
    51,579.84/77,353.58 = 19,987.71/x
  3. Step 3: Cross multiply
    51,579.84x = 77,353.58 × 19,987.71
  4. Step 4: Simplify right side
    51,579.84x = 1,546,121,119.51
  5. Step 5: Solve for x
    x = 1,546,121,119.51/51,579.84
  6. Step 6: Final answer
    x = 29,975.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.