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Finding the Fourth Proportional to 15,589.80, 21,520.08 and 9,623.88

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Solution

The fourth proportional to 15,589.80, 21,520.08 and 9,623.88 is: 13,284.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,589.80 : 21,520.08 = 9,623.88 : x
  2. Step 2: Convert to fraction form
    15,589.80/21,520.08 = 9,623.88/x
  3. Step 3: Cross multiply
    15,589.80x = 21,520.08 × 9,623.88
  4. Step 4: Simplify right side
    15,589.80x = 207,106,667.51
  5. Step 5: Solve for x
    x = 207,106,667.51/15,589.80
  6. Step 6: Final answer
    x = 13,284.75

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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.