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Finding the Fourth Proportional to 21,459.16, 29,615.01 and 11,900.14

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Solution

The fourth proportional to 21,459.16, 29,615.01 and 11,900.14 is: 16,422.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.16 : 29,615.01 = 11,900.14 : x
  2. Step 2: Convert to fraction form
    21,459.16/29,615.01 = 11,900.14/x
  3. Step 3: Cross multiply
    21,459.16x = 29,615.01 × 11,900.14
  4. Step 4: Simplify right side
    21,459.16x = 352,422,765.10
  5. Step 5: Solve for x
    x = 352,422,765.10/21,459.16
  6. Step 6: Final answer
    x = 16,422.95

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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.