Home / 12,720.08-17,552.76-7,130

Finding the Fourth Proportional to 12,720.08, 17,552.76 and 7,130

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Solution

The fourth proportional to 12,720.08, 17,552.76 and 7,130 is: 9,838.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.08 : 17,552.76 = 7,130 : x
  2. Step 2: Convert to fraction form
    12,720.08/17,552.76 = 7,130/x
  3. Step 3: Cross multiply
    12,720.08x = 17,552.76 × 7,130
  4. Step 4: Simplify right side
    12,720.08x = 125,151,178.80
  5. Step 5: Solve for x
    x = 125,151,178.80/12,720.08
  6. Step 6: Final answer
    x = 9,838.87

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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.