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Finding the Fourth Proportional to 19,245.40, 28,868.10 and 18,176.20

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Solution

The fourth proportional to 19,245.40, 28,868.10 and 18,176.20 is: 27,264.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,245.40 : 28,868.10 = 18,176.20 : x
  2. Step 2: Convert to fraction form
    19,245.40/28,868.10 = 18,176.20/x
  3. Step 3: Cross multiply
    19,245.40x = 28,868.10 × 18,176.20
  4. Step 4: Simplify right side
    19,245.40x = 524,712,359.22
  5. Step 5: Solve for x
    x = 524,712,359.22/19,245.40
  6. Step 6: Final answer
    x = 27,264.30

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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.