Home / 30,575.36-42,212.40-19,982.72

Finding the Fourth Proportional to 30,575.36, 42,212.40 and 19,982.72

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Solution

The fourth proportional to 30,575.36, 42,212.40 and 19,982.72 is: 27,588.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,575.36 : 42,212.40 = 19,982.72 : x
  2. Step 2: Convert to fraction form
    30,575.36/42,212.40 = 19,982.72/x
  3. Step 3: Cross multiply
    30,575.36x = 42,212.40 × 19,982.72
  4. Step 4: Simplify right side
    30,575.36x = 843,518,569.73
  5. Step 5: Solve for x
    x = 843,518,569.73/30,575.36
  6. Step 6: Final answer
    x = 27,588.18

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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.