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Finding the Fourth Proportional to 15,855.58, 21,871.14 and 10,188.46

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Solution

The fourth proportional to 15,855.58, 21,871.14 and 10,188.46 is: 14,053.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.58 : 21,871.14 = 10,188.46 : x
  2. Step 2: Convert to fraction form
    15,855.58/21,871.14 = 10,188.46/x
  3. Step 3: Cross multiply
    15,855.58x = 21,871.14 × 10,188.46
  4. Step 4: Simplify right side
    15,855.58x = 222,833,235.04
  5. Step 5: Solve for x
    x = 222,833,235.04/15,855.58
  6. Step 6: Final answer
    x = 14,053.93

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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.