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Finding the Fourth Proportional to 19,007.20, 28,510.80 and 7,910.20

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Solution

The fourth proportional to 19,007.20, 28,510.80 and 7,910.20 is: 11,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007.20 : 28,510.80 = 7,910.20 : x
  2. Step 2: Convert to fraction form
    19,007.20/28,510.80 = 7,910.20/x
  3. Step 3: Cross multiply
    19,007.20x = 28,510.80 × 7,910.20
  4. Step 4: Simplify right side
    19,007.20x = 225,526,130.16
  5. Step 5: Solve for x
    x = 225,526,130.16/19,007.20
  6. Step 6: Final answer
    x = 11,865.30

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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.