Home / 21,040.29-31,530.35-15,449.77

Finding the Fourth Proportional to 21,040.29, 31,530.35 and 15,449.77

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Solution

The fourth proportional to 21,040.29, 31,530.35 and 15,449.77 is: 23,152.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.29 : 31,530.35 = 15,449.77 : x
  2. Step 2: Convert to fraction form
    21,040.29/31,530.35 = 15,449.77/x
  3. Step 3: Cross multiply
    21,040.29x = 31,530.35 × 15,449.77
  4. Step 4: Simplify right side
    21,040.29x = 487,136,655.52
  5. Step 5: Solve for x
    x = 487,136,655.52/21,040.29
  6. Step 6: Final answer
    x = 23,152.56

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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.