Home / 13,748.45-18,973.37-7,780.37

Finding the Fourth Proportional to 13,748.45, 18,973.37 and 7,780.37

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Solution

The fourth proportional to 13,748.45, 18,973.37 and 7,780.37 is: 10,737.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.45 : 18,973.37 = 7,780.37 : x
  2. Step 2: Convert to fraction form
    13,748.45/18,973.37 = 7,780.37/x
  3. Step 3: Cross multiply
    13,748.45x = 18,973.37 × 7,780.37
  4. Step 4: Simplify right side
    13,748.45x = 147,619,763.33
  5. Step 5: Solve for x
    x = 147,619,763.33/13,748.45
  6. Step 6: Final answer
    x = 10,737.20

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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.