Home / 52,720.51-79,080.80-21,555.76

Finding the Fourth Proportional to 52,720.51, 79,080.80 and 21,555.76

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Solution

The fourth proportional to 52,720.51, 79,080.80 and 21,555.76 is: 32,333.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,720.51 : 79,080.80 = 21,555.76 : x
  2. Step 2: Convert to fraction form
    52,720.51/79,080.80 = 21,555.76/x
  3. Step 3: Cross multiply
    52,720.51x = 79,080.80 × 21,555.76
  4. Step 4: Simplify right side
    52,720.51x = 1,704,646,745.41
  5. Step 5: Solve for x
    x = 1,704,646,745.41/52,720.51
  6. Step 6: Final answer
    x = 32,333.65

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Double scale
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Similar ratio
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1.5x scale

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.