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Finding the Fourth Proportional to 15,876.25, 21,902.81 and 9,503.08

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Solution

The fourth proportional to 15,876.25, 21,902.81 and 9,503.08 is: 13,110.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.25 : 21,902.81 = 9,503.08 : x
  2. Step 2: Convert to fraction form
    15,876.25/21,902.81 = 9,503.08/x
  3. Step 3: Cross multiply
    15,876.25x = 21,902.81 × 9,503.08
  4. Step 4: Simplify right side
    15,876.25x = 208,144,207.39
  5. Step 5: Solve for x
    x = 208,144,207.39/15,876.25
  6. Step 6: Final answer
    x = 13,110.41

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1.5x scale

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.