Home / 13,209.47-18,228.51-7,907.21

Finding the Fourth Proportional to 13,209.47, 18,228.51 and 7,907.21

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Solution

The fourth proportional to 13,209.47, 18,228.51 and 7,907.21 is: 10,911.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.47 : 18,228.51 = 7,907.21 : x
  2. Step 2: Convert to fraction form
    13,209.47/18,228.51 = 7,907.21/x
  3. Step 3: Cross multiply
    13,209.47x = 18,228.51 × 7,907.21
  4. Step 4: Simplify right side
    13,209.47x = 144,136,656.56
  5. Step 5: Solve for x
    x = 144,136,656.56/13,209.47
  6. Step 6: Final answer
    x = 10,911.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.