Home / 51,378.18-77,072.40-13,938.84

Finding the Fourth Proportional to 51,378.18, 77,072.40 and 13,938.84

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Solution

The fourth proportional to 51,378.18, 77,072.40 and 13,938.84 is: 20,909.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,378.18 : 77,072.40 = 13,938.84 : x
  2. Step 2: Convert to fraction form
    51,378.18/77,072.40 = 13,938.84/x
  3. Step 3: Cross multiply
    51,378.18x = 77,072.40 × 13,938.84
  4. Step 4: Simplify right side
    51,378.18x = 1,074,299,852.02
  5. Step 5: Solve for x
    x = 1,074,299,852.02/51,378.18
  6. Step 6: Final answer
    x = 20,909.65

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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.