Home / 13,213.80-19,820.70-12,983.40

Finding the Fourth Proportional to 13,213.80, 19,820.70 and 12,983.40

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Solution

The fourth proportional to 13,213.80, 19,820.70 and 12,983.40 is: 19,475.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.80 : 19,820.70 = 12,983.40 : x
  2. Step 2: Convert to fraction form
    13,213.80/19,820.70 = 12,983.40/x
  3. Step 3: Cross multiply
    13,213.80x = 19,820.70 × 12,983.40
  4. Step 4: Simplify right side
    13,213.80x = 257,340,076.38
  5. Step 5: Solve for x
    x = 257,340,076.38/13,213.80
  6. Step 6: Final answer
    x = 19,475.10

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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.