Home / 21,102.78-29,118.61-12,148.55

Finding the Fourth Proportional to 21,102.78, 29,118.61 and 12,148.55

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Solution

The fourth proportional to 21,102.78, 29,118.61 and 12,148.55 is: 16,763.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.78 : 29,118.61 = 12,148.55 : x
  2. Step 2: Convert to fraction form
    21,102.78/29,118.61 = 12,148.55/x
  3. Step 3: Cross multiply
    21,102.78x = 29,118.61 × 12,148.55
  4. Step 4: Simplify right side
    21,102.78x = 353,748,931.94
  5. Step 5: Solve for x
    x = 353,748,931.94/21,102.78
  6. Step 6: Final answer
    x = 16,763.14

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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.