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Finding the Fourth Proportional to 13,009.20, 19,513.80 and 12,814.80

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Solution

The fourth proportional to 13,009.20, 19,513.80 and 12,814.80 is: 19,222.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,009.20 : 19,513.80 = 12,814.80 : x
  2. Step 2: Convert to fraction form
    13,009.20/19,513.80 = 12,814.80/x
  3. Step 3: Cross multiply
    13,009.20x = 19,513.80 × 12,814.80
  4. Step 4: Simplify right side
    13,009.20x = 250,065,444.24
  5. Step 5: Solve for x
    x = 250,065,444.24/13,009.20
  6. Step 6: Final answer
    x = 19,222.20

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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.