Home / 21,132.52-31,512.77-19,655.08

Finding the Fourth Proportional to 21,132.52, 31,512.77 and 19,655.08

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Solution

The fourth proportional to 21,132.52, 31,512.77 and 19,655.08 is: 29,309.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.52 : 31,512.77 = 19,655.08 : x
  2. Step 2: Convert to fraction form
    21,132.52/31,512.77 = 19,655.08/x
  3. Step 3: Cross multiply
    21,132.52x = 31,512.77 × 19,655.08
  4. Step 4: Simplify right side
    21,132.52x = 619,386,015.37
  5. Step 5: Solve for x
    x = 619,386,015.37/21,132.52
  6. Step 6: Final answer
    x = 29,309.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.