Home / 13,130.20-19,709.70-8,205.40

Finding the Fourth Proportional to 13,130.20, 19,709.70 and 8,205.40

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Solution

The fourth proportional to 13,130.20, 19,709.70 and 8,205.40 is: 12,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.20 : 19,709.70 = 8,205.40 : x
  2. Step 2: Convert to fraction form
    13,130.20/19,709.70 = 8,205.40/x
  3. Step 3: Cross multiply
    13,130.20x = 19,709.70 × 8,205.40
  4. Step 4: Simplify right side
    13,130.20x = 161,725,972.38
  5. Step 5: Solve for x
    x = 161,725,972.38/13,130.20
  6. Step 6: Final answer
    x = 12,317.10

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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.