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Finding the Fourth Proportional to 21,627.40, 29,810.82 and 15,659.40

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Solution

The fourth proportional to 21,627.40, 29,810.82 and 15,659.40 is: 21,584.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,627.40 : 29,810.82 = 15,659.40 : x
  2. Step 2: Convert to fraction form
    21,627.40/29,810.82 = 15,659.40/x
  3. Step 3: Cross multiply
    21,627.40x = 29,810.82 × 15,659.40
  4. Step 4: Simplify right side
    21,627.40x = 466,819,554.71
  5. Step 5: Solve for x
    x = 466,819,554.71/21,627.40
  6. Step 6: Final answer
    x = 21,584.64

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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.