Home / 15,729.52-21,699.48-10,142.32

Finding the Fourth Proportional to 15,729.52, 21,699.48 and 10,142.32

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Solution

The fourth proportional to 15,729.52, 21,699.48 and 10,142.32 is: 13,991.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.52 : 21,699.48 = 10,142.32 : x
  2. Step 2: Convert to fraction form
    15,729.52/21,699.48 = 10,142.32/x
  3. Step 3: Cross multiply
    15,729.52x = 21,699.48 × 10,142.32
  4. Step 4: Simplify right side
    15,729.52x = 220,083,069.99
  5. Step 5: Solve for x
    x = 220,083,069.99/15,729.52
  6. Step 6: Final answer
    x = 13,991.72

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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.