Home / 13,108.60-18,089.90-7,140.14

Finding the Fourth Proportional to 13,108.60, 18,089.90 and 7,140.14

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Solution

The fourth proportional to 13,108.60, 18,089.90 and 7,140.14 is: 9,853.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.60 : 18,089.90 = 7,140.14 : x
  2. Step 2: Convert to fraction form
    13,108.60/18,089.90 = 7,140.14/x
  3. Step 3: Cross multiply
    13,108.60x = 18,089.90 × 7,140.14
  4. Step 4: Simplify right side
    13,108.60x = 129,164,418.59
  5. Step 5: Solve for x
    x = 129,164,418.59/13,108.60
  6. Step 6: Final answer
    x = 9,853.41

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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.