Home / 21,070.24-31,536.78-15,521.40

Finding the Fourth Proportional to 21,070.24, 31,536.78 and 15,521.40

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Solution

The fourth proportional to 21,070.24, 31,536.78 and 15,521.40 is: 23,231.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.24 : 31,536.78 = 15,521.40 : x
  2. Step 2: Convert to fraction form
    21,070.24/31,536.78 = 15,521.40/x
  3. Step 3: Cross multiply
    21,070.24x = 31,536.78 × 15,521.40
  4. Step 4: Simplify right side
    21,070.24x = 489,494,977.09
  5. Step 5: Solve for x
    x = 489,494,977.09/21,070.24
  6. Step 6: Final answer
    x = 23,231.58

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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.