Home / 21,886.47-30,204.63-12,455.10

Finding the Fourth Proportional to 21,886.47, 30,204.63 and 12,455.10

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Solution

The fourth proportional to 21,886.47, 30,204.63 and 12,455.10 is: 17,188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.47 : 30,204.63 = 12,455.10 : x
  2. Step 2: Convert to fraction form
    21,886.47/30,204.63 = 12,455.10/x
  3. Step 3: Cross multiply
    21,886.47x = 30,204.63 × 12,455.10
  4. Step 4: Simplify right side
    21,886.47x = 376,201,687.11
  5. Step 5: Solve for x
    x = 376,201,687.11/21,886.47
  6. Step 6: Final answer
    x = 17,188.78

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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.