Home / 13,820.68-20,700.78-7,962.76

Finding the Fourth Proportional to 13,820.68, 20,700.78 and 7,962.76

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Solution

The fourth proportional to 13,820.68, 20,700.78 and 7,962.76 is: 11,926.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.68 : 20,700.78 = 7,962.76 : x
  2. Step 2: Convert to fraction form
    13,820.68/20,700.78 = 7,962.76/x
  3. Step 3: Cross multiply
    13,820.68x = 20,700.78 × 7,962.76
  4. Step 4: Simplify right side
    13,820.68x = 164,835,342.95
  5. Step 5: Solve for x
    x = 164,835,342.95/13,820.68
  6. Step 6: Final answer
    x = 11,926.72

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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.