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Finding the Fourth Proportional to 15,759.63, 21,746.98 and 8,686.04

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Solution

The fourth proportional to 15,759.63, 21,746.98 and 8,686.04 is: 11,986.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,759.63 : 21,746.98 = 8,686.04 : x
  2. Step 2: Convert to fraction form
    15,759.63/21,746.98 = 8,686.04/x
  3. Step 3: Cross multiply
    15,759.63x = 21,746.98 × 8,686.04
  4. Step 4: Simplify right side
    15,759.63x = 188,895,040.28
  5. Step 5: Solve for x
    x = 188,895,040.28/15,759.63
  6. Step 6: Final answer
    x = 11,986.01

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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.