Home / 21,085.24-31,534.86-18,761.68

Finding the Fourth Proportional to 21,085.24, 31,534.86 and 18,761.68

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Solution

The fourth proportional to 21,085.24, 31,534.86 and 18,761.68 is: 28,059.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.24 : 31,534.86 = 18,761.68 : x
  2. Step 2: Convert to fraction form
    21,085.24/31,534.86 = 18,761.68/x
  3. Step 3: Cross multiply
    21,085.24x = 31,534.86 × 18,761.68
  4. Step 4: Simplify right side
    21,085.24x = 591,646,952.16
  5. Step 5: Solve for x
    x = 591,646,952.16/21,085.24
  6. Step 6: Final answer
    x = 28,059.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.