Home / 30,858.60-42,603.12-20,266.80

Finding the Fourth Proportional to 30,858.60, 42,603.12 and 20,266.80

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Solution

The fourth proportional to 30,858.60, 42,603.12 and 20,266.80 is: 27,980.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,858.60 : 42,603.12 = 20,266.80 : x
  2. Step 2: Convert to fraction form
    30,858.60/42,603.12 = 20,266.80/x
  3. Step 3: Cross multiply
    30,858.60x = 42,603.12 × 20,266.80
  4. Step 4: Simplify right side
    30,858.60x = 863,428,912.42
  5. Step 5: Solve for x
    x = 863,428,912.42/30,858.60
  6. Step 6: Final answer
    x = 27,980.17

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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.