Home / 15,718.49-21,682.31-10,129.49

Finding the Fourth Proportional to 15,718.49, 21,682.31 and 10,129.49

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Solution

The fourth proportional to 15,718.49, 21,682.31 and 10,129.49 is: 13,972.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.49 : 21,682.31 = 10,129.49 : x
  2. Step 2: Convert to fraction form
    15,718.49/21,682.31 = 10,129.49/x
  3. Step 3: Cross multiply
    15,718.49x = 21,682.31 × 10,129.49
  4. Step 4: Simplify right side
    15,718.49x = 219,630,583.26
  5. Step 5: Solve for x
    x = 219,630,583.26/15,718.49
  6. Step 6: Final answer
    x = 13,972.76

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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.