Home / 7,128.24-9,837.90-3,985.08

Finding the Fourth Proportional to 7,128.24, 9,837.90 and 3,985.08

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Solution

The fourth proportional to 7,128.24, 9,837.90 and 3,985.08 is: 5,499.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.24 : 9,837.90 = 3,985.08 : x
  2. Step 2: Convert to fraction form
    7,128.24/9,837.90 = 3,985.08/x
  3. Step 3: Cross multiply
    7,128.24x = 9,837.90 × 3,985.08
  4. Step 4: Simplify right side
    7,128.24x = 39,204,818.53
  5. Step 5: Solve for x
    x = 39,204,818.53/7,128.24
  6. Step 6: Final answer
    x = 5,499.93

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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.