Home / 19,428.76-29,143.16-8,742.64

Finding the Fourth Proportional to 19,428.76, 29,143.16 and 8,742.64

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Solution

The fourth proportional to 19,428.76, 29,143.16 and 8,742.64 is: 13,113.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,428.76 : 29,143.16 = 8,742.64 : x
  2. Step 2: Convert to fraction form
    19,428.76/29,143.16 = 8,742.64/x
  3. Step 3: Cross multiply
    19,428.76x = 29,143.16 × 8,742.64
  4. Step 4: Simplify right side
    19,428.76x = 254,788,156.34
  5. Step 5: Solve for x
    x = 254,788,156.34/19,428.76
  6. Step 6: Final answer
    x = 13,113.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.