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Finding the Fourth Proportional to 15,723.71, 21,698.88 and 9,009.18

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Solution

The fourth proportional to 15,723.71, 21,698.88 and 9,009.18 is: 12,432.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,723.71 : 21,698.88 = 9,009.18 : x
  2. Step 2: Convert to fraction form
    15,723.71/21,698.88 = 9,009.18/x
  3. Step 3: Cross multiply
    15,723.71x = 21,698.88 × 9,009.18
  4. Step 4: Simplify right side
    15,723.71x = 195,489,115.72
  5. Step 5: Solve for x
    x = 195,489,115.72/15,723.71
  6. Step 6: Final answer
    x = 12,432.76

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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.