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Finding the Fourth Proportional to 15,859.82, 21,888.88 and 9,144.13

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Solution

The fourth proportional to 15,859.82, 21,888.88 and 9,144.13 is: 12,620.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,859.82 : 21,888.88 = 9,144.13 : x
  2. Step 2: Convert to fraction form
    15,859.82/21,888.88 = 9,144.13/x
  3. Step 3: Cross multiply
    15,859.82x = 21,888.88 × 9,144.13
  4. Step 4: Simplify right side
    15,859.82x = 200,154,741.41
  5. Step 5: Solve for x
    x = 200,154,741.41/15,859.82
  6. Step 6: Final answer
    x = 12,620.24

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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.