Home / 51,921.31-77,881.96-12,478.43

Finding the Fourth Proportional to 51,921.31, 77,881.96 and 12,478.43

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Solution

The fourth proportional to 51,921.31, 77,881.96 and 12,478.43 is: 18,717.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,921.31 : 77,881.96 = 12,478.43 : x
  2. Step 2: Convert to fraction form
    51,921.31/77,881.96 = 12,478.43/x
  3. Step 3: Cross multiply
    51,921.31x = 77,881.96 × 12,478.43
  4. Step 4: Simplify right side
    51,921.31x = 971,844,196.71
  5. Step 5: Solve for x
    x = 971,844,196.71/51,921.31
  6. Step 6: Final answer
    x = 18,717.64

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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.