Home / 13,420.33-18,520.10-7,452.01

Finding the Fourth Proportional to 13,420.33, 18,520.10 and 7,452.01

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Solution

The fourth proportional to 13,420.33, 18,520.10 and 7,452.01 is: 10,283.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.33 : 18,520.10 = 7,452.01 : x
  2. Step 2: Convert to fraction form
    13,420.33/18,520.10 = 7,452.01/x
  3. Step 3: Cross multiply
    13,420.33x = 18,520.10 × 7,452.01
  4. Step 4: Simplify right side
    13,420.33x = 138,011,984.24
  5. Step 5: Solve for x
    x = 138,011,984.24/13,420.33
  6. Step 6: Final answer
    x = 10,283.80

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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.