Home / 30,775.32-42,462.90-19,431.18

Finding the Fourth Proportional to 30,775.32, 42,462.90 and 19,431.18

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Solution

The fourth proportional to 30,775.32, 42,462.90 and 19,431.18 is: 26,810.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,775.32 : 42,462.90 = 19,431.18 : x
  2. Step 2: Convert to fraction form
    30,775.32/42,462.90 = 19,431.18/x
  3. Step 3: Cross multiply
    30,775.32x = 42,462.90 × 19,431.18
  4. Step 4: Simplify right side
    30,775.32x = 825,104,253.22
  5. Step 5: Solve for x
    x = 825,104,253.22/30,775.32
  6. Step 6: Final answer
    x = 26,810.58

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Half scale
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Double scale
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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.