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Finding the Fourth Proportional to 15,476.84, 21,362.92 and 9,887.84

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Solution

The fourth proportional to 15,476.84, 21,362.92 and 9,887.84 is: 13,648.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,476.84 : 21,362.92 = 9,887.84 : x
  2. Step 2: Convert to fraction form
    15,476.84/21,362.92 = 9,887.84/x
  3. Step 3: Cross multiply
    15,476.84x = 21,362.92 × 9,887.84
  4. Step 4: Simplify right side
    15,476.84x = 211,233,134.89
  5. Step 5: Solve for x
    x = 211,233,134.89/15,476.84
  6. Step 6: Final answer
    x = 13,648.34

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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.