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Finding the Fourth Proportional to 19,345.82, 28,787.04 and 19,280.21

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Solution

The fourth proportional to 19,345.82, 28,787.04 and 19,280.21 is: 28,689.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,345.82 : 28,787.04 = 19,280.21 : x
  2. Step 2: Convert to fraction form
    19,345.82/28,787.04 = 19,280.21/x
  3. Step 3: Cross multiply
    19,345.82x = 28,787.04 × 19,280.21
  4. Step 4: Simplify right side
    19,345.82x = 555,020,032.54
  5. Step 5: Solve for x
    x = 555,020,032.54/19,345.82
  6. Step 6: Final answer
    x = 28,689.41

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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.