Home / 30,875.85-42,564.06-20,247.03

Finding the Fourth Proportional to 30,875.85, 42,564.06 and 20,247.03

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Solution

The fourth proportional to 30,875.85, 42,564.06 and 20,247.03 is: 27,911.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,875.85 : 42,564.06 = 20,247.03 : x
  2. Step 2: Convert to fraction form
    30,875.85/42,564.06 = 20,247.03/x
  3. Step 3: Cross multiply
    30,875.85x = 42,564.06 × 20,247.03
  4. Step 4: Simplify right side
    30,875.85x = 861,795,799.74
  5. Step 5: Solve for x
    x = 861,795,799.74/30,875.85
  6. Step 6: Final answer
    x = 27,911.65

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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.