Home / 7,129.62-9,837.33-3,985.70

Finding the Fourth Proportional to 7,129.62, 9,837.33 and 3,985.70

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Solution

The fourth proportional to 7,129.62, 9,837.33 and 3,985.70 is: 5,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.62 : 9,837.33 = 3,985.70 : x
  2. Step 2: Convert to fraction form
    7,129.62/9,837.33 = 3,985.70/x
  3. Step 3: Cross multiply
    7,129.62x = 9,837.33 × 3,985.70
  4. Step 4: Simplify right side
    7,129.62x = 39,208,646.18
  5. Step 5: Solve for x
    x = 39,208,646.18/7,129.62
  6. Step 6: Final answer
    x = 5,499.40

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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.