Home / 28,780.77-43,159.82-13,985.31

Finding the Fourth Proportional to 28,780.77, 43,159.82 and 13,985.31

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Solution

The fourth proportional to 28,780.77, 43,159.82 and 13,985.31 is: 20,972.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,780.77 : 43,159.82 = 13,985.31 : x
  2. Step 2: Convert to fraction form
    28,780.77/43,159.82 = 13,985.31/x
  3. Step 3: Cross multiply
    28,780.77x = 43,159.82 × 13,985.31
  4. Step 4: Simplify right side
    28,780.77x = 603,603,392.32
  5. Step 5: Solve for x
    x = 603,603,392.32/28,780.77
  6. Step 6: Final answer
    x = 20,972.45

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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.