Home / 21,051.80-31,423.59-18,560.75

Finding the Fourth Proportional to 21,051.80, 31,423.59 and 18,560.75

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Solution

The fourth proportional to 21,051.80, 31,423.59 and 18,560.75 is: 27,705.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.80 : 31,423.59 = 18,560.75 : x
  2. Step 2: Convert to fraction form
    21,051.80/31,423.59 = 18,560.75/x
  3. Step 3: Cross multiply
    21,051.80x = 31,423.59 × 18,560.75
  4. Step 4: Simplify right side
    21,051.80x = 583,245,305.29
  5. Step 5: Solve for x
    x = 583,245,305.29/21,051.80
  6. Step 6: Final answer
    x = 27,705.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.