Home / 7,129.18-9,838.47-3,985.30

Finding the Fourth Proportional to 7,129.18, 9,838.47 and 3,985.30

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Solution

The fourth proportional to 7,129.18, 9,838.47 and 3,985.30 is: 5,499.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.18 : 9,838.47 = 3,985.30 : x
  2. Step 2: Convert to fraction form
    7,129.18/9,838.47 = 3,985.30/x
  3. Step 3: Cross multiply
    7,129.18x = 9,838.47 × 3,985.30
  4. Step 4: Simplify right side
    7,129.18x = 39,209,254.49
  5. Step 5: Solve for x
    x = 39,209,254.49/7,129.18
  6. Step 6: Final answer
    x = 5,499.83

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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.