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Finding the Fourth Proportional to 15,873.72, 21,895.80 and 10,215.82

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Solution

The fourth proportional to 15,873.72, 21,895.80 and 10,215.82 is: 14,091.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,873.72 : 21,895.80 = 10,215.82 : x
  2. Step 2: Convert to fraction form
    15,873.72/21,895.80 = 10,215.82/x
  3. Step 3: Cross multiply
    15,873.72x = 21,895.80 × 10,215.82
  4. Step 4: Simplify right side
    15,873.72x = 223,683,551.56
  5. Step 5: Solve for x
    x = 223,683,551.56/15,873.72
  6. Step 6: Final answer
    x = 14,091.44

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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.