Home / 21,098.43-31,510.62-19,120.05

Finding the Fourth Proportional to 21,098.43, 31,510.62 and 19,120.05

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Solution

The fourth proportional to 21,098.43, 31,510.62 and 19,120.05 is: 28,555.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,098.43 : 31,510.62 = 19,120.05 : x
  2. Step 2: Convert to fraction form
    21,098.43/31,510.62 = 19,120.05/x
  3. Step 3: Cross multiply
    21,098.43x = 31,510.62 × 19,120.05
  4. Step 4: Simplify right side
    21,098.43x = 602,484,629.93
  5. Step 5: Solve for x
    x = 602,484,629.93/21,098.43
  6. Step 6: Final answer
    x = 28,555.90

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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.