Home / 28,480.16-42,654.60-19,721.28

Finding the Fourth Proportional to 28,480.16, 42,654.60 and 19,721.28

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Solution

The fourth proportional to 28,480.16, 42,654.60 and 19,721.28 is: 29,536.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.16 : 42,654.60 = 19,721.28 : x
  2. Step 2: Convert to fraction form
    28,480.16/42,654.60 = 19,721.28/x
  3. Step 3: Cross multiply
    28,480.16x = 42,654.60 × 19,721.28
  4. Step 4: Simplify right side
    28,480.16x = 841,203,309.89
  5. Step 5: Solve for x
    x = 841,203,309.89/28,480.16
  6. Step 6: Final answer
    x = 29,536.47

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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.