Home / 13,031.76-17,985.30-7,368.78

Finding the Fourth Proportional to 13,031.76, 17,985.30 and 7,368.78

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Solution

The fourth proportional to 13,031.76, 17,985.30 and 7,368.78 is: 10,169.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,031.76 : 17,985.30 = 7,368.78 : x
  2. Step 2: Convert to fraction form
    13,031.76/17,985.30 = 7,368.78/x
  3. Step 3: Cross multiply
    13,031.76x = 17,985.30 × 7,368.78
  4. Step 4: Simplify right side
    13,031.76x = 132,529,718.93
  5. Step 5: Solve for x
    x = 132,529,718.93/13,031.76
  6. Step 6: Final answer
    x = 10,169.75

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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.