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Finding the Fourth Proportional to 25,484.29, 38,208.99 and 12,980.11

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Solution

The fourth proportional to 25,484.29, 38,208.99 and 12,980.11 is: 19,461.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,484.29 : 38,208.99 = 12,980.11 : x
  2. Step 2: Convert to fraction form
    25,484.29/38,208.99 = 12,980.11/x
  3. Step 3: Cross multiply
    25,484.29x = 38,208.99 × 12,980.11
  4. Step 4: Simplify right side
    25,484.29x = 495,956,893.19
  5. Step 5: Solve for x
    x = 495,956,893.19/25,484.29
  6. Step 6: Final answer
    x = 19,461.28

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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.