Home / 42,633.05-63,938.67-12,640.28

Finding the Fourth Proportional to 42,633.05, 63,938.67 and 12,640.28

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Solution

The fourth proportional to 42,633.05, 63,938.67 and 12,640.28 is: 18,957.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,633.05 : 63,938.67 = 12,640.28 : x
  2. Step 2: Convert to fraction form
    42,633.05/63,938.67 = 12,640.28/x
  3. Step 3: Cross multiply
    42,633.05x = 63,938.67 × 12,640.28
  4. Step 4: Simplify right side
    42,633.05x = 808,202,575.46
  5. Step 5: Solve for x
    x = 808,202,575.46/42,633.05
  6. Step 6: Final answer
    x = 18,957.18

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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.