Home / 7,129.24-9,838.40-3,985.48

Finding the Fourth Proportional to 7,129.24, 9,838.40 and 3,985.48

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Solution

The fourth proportional to 7,129.24, 9,838.40 and 3,985.48 is: 5,499.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.24 : 9,838.40 = 3,985.48 : x
  2. Step 2: Convert to fraction form
    7,129.24/9,838.40 = 3,985.48/x
  3. Step 3: Cross multiply
    7,129.24x = 9,838.40 × 3,985.48
  4. Step 4: Simplify right side
    7,129.24x = 39,210,746.43
  5. Step 5: Solve for x
    x = 39,210,746.43/7,129.24
  6. Step 6: Final answer
    x = 5,499.99

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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.