Home / 51,378.49-77,069.36-13,938.47

Finding the Fourth Proportional to 51,378.49, 77,069.36 and 13,938.47

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Solution

The fourth proportional to 51,378.49, 77,069.36 and 13,938.47 is: 20,908.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,378.49 : 77,069.36 = 13,938.47 : x
  2. Step 2: Convert to fraction form
    51,378.49/77,069.36 = 13,938.47/x
  3. Step 3: Cross multiply
    51,378.49x = 77,069.36 × 13,938.47
  4. Step 4: Simplify right side
    51,378.49x = 1,074,228,962.28
  5. Step 5: Solve for x
    x = 1,074,228,962.28/51,378.49
  6. Step 6: Final answer
    x = 20,908.15

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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.