Home / 13,108.80-18,089.04-7,442.40

Finding the Fourth Proportional to 13,108.80, 18,089.04 and 7,442.40

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Solution

The fourth proportional to 13,108.80, 18,089.04 and 7,442.40 is: 10,269.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.80 : 18,089.04 = 7,442.40 : x
  2. Step 2: Convert to fraction form
    13,108.80/18,089.04 = 7,442.40/x
  3. Step 3: Cross multiply
    13,108.80x = 18,089.04 × 7,442.40
  4. Step 4: Simplify right side
    13,108.80x = 134,625,871.30
  5. Step 5: Solve for x
    x = 134,625,871.30/13,108.80
  6. Step 6: Final answer
    x = 10,269.89

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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.