Home / 42,721.93-64,083.90-13,140.03

Finding the Fourth Proportional to 42,721.93, 64,083.90 and 13,140.03

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Solution

The fourth proportional to 42,721.93, 64,083.90 and 13,140.03 is: 19,710.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,721.93 : 64,083.90 = 13,140.03 : x
  2. Step 2: Convert to fraction form
    42,721.93/64,083.90 = 13,140.03/x
  3. Step 3: Cross multiply
    42,721.93x = 64,083.90 × 13,140.03
  4. Step 4: Simplify right side
    42,721.93x = 842,064,368.52
  5. Step 5: Solve for x
    x = 842,064,368.52/42,721.93
  6. Step 6: Final answer
    x = 19,710.36

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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.