Home / 30,573.36-42,209.64-19,980.72

Finding the Fourth Proportional to 30,573.36, 42,209.64 and 19,980.72

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Solution

The fourth proportional to 30,573.36, 42,209.64 and 19,980.72 is: 27,585.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,573.36 : 42,209.64 = 19,980.72 : x
  2. Step 2: Convert to fraction form
    30,573.36/42,209.64 = 19,980.72/x
  3. Step 3: Cross multiply
    30,573.36x = 42,209.64 × 19,980.72
  4. Step 4: Simplify right side
    30,573.36x = 843,378,998.14
  5. Step 5: Solve for x
    x = 843,378,998.14/30,573.36
  6. Step 6: Final answer
    x = 27,585.42

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.