Home / 31,020-42,807.04-16,872.64

Finding the Fourth Proportional to 31,020, 42,807.04 and 16,872.64

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Solution

The fourth proportional to 31,020, 42,807.04 and 16,872.64 is: 23,283.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,020 : 42,807.04 = 16,872.64 : x
  2. Step 2: Convert to fraction form
    31,020/42,807.04 = 16,872.64/x
  3. Step 3: Cross multiply
    31,020x = 42,807.04 × 16,872.64
  4. Step 4: Simplify right side
    31,020x = 722,267,775.39
  5. Step 5: Solve for x
    x = 722,267,775.39/31,020
  6. Step 6: Final answer
    x = 23,283.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.