Home / 30,603.72-42,222.31-19,999.51

Finding the Fourth Proportional to 30,603.72, 42,222.31 and 19,999.51

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Solution

The fourth proportional to 30,603.72, 42,222.31 and 19,999.51 is: 27,592.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,603.72 : 42,222.31 = 19,999.51 : x
  2. Step 2: Convert to fraction form
    30,603.72/42,222.31 = 19,999.51/x
  3. Step 3: Cross multiply
    30,603.72x = 42,222.31 × 19,999.51
  4. Step 4: Simplify right side
    30,603.72x = 844,425,468.01
  5. Step 5: Solve for x
    x = 844,425,468.01/30,603.72
  6. Step 6: Final answer
    x = 27,592.25

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1.5x scale

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.