Home / 31,605.04-43,577.40-20,977.84

Finding the Fourth Proportional to 31,605.04, 43,577.40 and 20,977.84

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Solution

The fourth proportional to 31,605.04, 43,577.40 and 20,977.84 is: 28,924.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,605.04 : 43,577.40 = 20,977.84 : x
  2. Step 2: Convert to fraction form
    31,605.04/43,577.40 = 20,977.84/x
  3. Step 3: Cross multiply
    31,605.04x = 43,577.40 × 20,977.84
  4. Step 4: Simplify right side
    31,605.04x = 914,159,724.82
  5. Step 5: Solve for x
    x = 914,159,724.82/31,605.04
  6. Step 6: Final answer
    x = 28,924.49

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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.