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Finding the Fourth Proportional to 16,813.20, 25,219.80 and 15,430.80

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Solution

The fourth proportional to 16,813.20, 25,219.80 and 15,430.80 is: 23,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,813.20 : 25,219.80 = 15,430.80 : x
  2. Step 2: Convert to fraction form
    16,813.20/25,219.80 = 15,430.80/x
  3. Step 3: Cross multiply
    16,813.20x = 25,219.80 × 15,430.80
  4. Step 4: Simplify right side
    16,813.20x = 389,161,689.84
  5. Step 5: Solve for x
    x = 389,161,689.84/16,813.20
  6. Step 6: Final answer
    x = 23,146.20

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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.