Home / 13,090.90-18,065.23-7,122.43

Finding the Fourth Proportional to 13,090.90, 18,065.23 and 7,122.43

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Solution

The fourth proportional to 13,090.90, 18,065.23 and 7,122.43 is: 9,828.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.90 : 18,065.23 = 7,122.43 : x
  2. Step 2: Convert to fraction form
    13,090.90/18,065.23 = 7,122.43/x
  3. Step 3: Cross multiply
    13,090.90x = 18,065.23 × 7,122.43
  4. Step 4: Simplify right side
    13,090.90x = 128,668,336.11
  5. Step 5: Solve for x
    x = 128,668,336.11/13,090.90
  6. Step 6: Final answer
    x = 9,828.84

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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.