Home / 13,108.85-18,090.19-7,140.50

Finding the Fourth Proportional to 13,108.85, 18,090.19 and 7,140.50

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Solution

The fourth proportional to 13,108.85, 18,090.19 and 7,140.50 is: 9,853.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.85 : 18,090.19 = 7,140.50 : x
  2. Step 2: Convert to fraction form
    13,108.85/18,090.19 = 7,140.50/x
  3. Step 3: Cross multiply
    13,108.85x = 18,090.19 × 7,140.50
  4. Step 4: Simplify right side
    13,108.85x = 129,173,001.70
  5. Step 5: Solve for x
    x = 129,173,001.70/13,108.85
  6. Step 6: Final answer
    x = 9,853.88

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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.