Home / 19,122.30-28,672.31-7,421.85

Finding the Fourth Proportional to 19,122.30, 28,672.31 and 7,421.85

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Solution

The fourth proportional to 19,122.30, 28,672.31 and 7,421.85 is: 11,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,122.30 : 28,672.31 = 7,421.85 : x
  2. Step 2: Convert to fraction form
    19,122.30/28,672.31 = 7,421.85/x
  3. Step 3: Cross multiply
    19,122.30x = 28,672.31 × 7,421.85
  4. Step 4: Simplify right side
    19,122.30x = 212,801,602.53
  5. Step 5: Solve for x
    x = 212,801,602.53/19,122.30
  6. Step 6: Final answer
    x = 11,128.45

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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.