Home / 42,721.34-64,092.95-13,139.43

Finding the Fourth Proportional to 42,721.34, 64,092.95 and 13,139.43

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Solution

The fourth proportional to 42,721.34, 64,092.95 and 13,139.43 is: 19,712.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,721.34 : 64,092.95 = 13,139.43 : x
  2. Step 2: Convert to fraction form
    42,721.34/64,092.95 = 13,139.43/x
  3. Step 3: Cross multiply
    42,721.34x = 64,092.95 × 13,139.43
  4. Step 4: Simplify right side
    42,721.34x = 842,144,764.32
  5. Step 5: Solve for x
    x = 842,144,764.32/42,721.34
  6. Step 6: Final answer
    x = 19,712.51

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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.