Home / 30,562.20-42,177.78-19,980.36

Finding the Fourth Proportional to 30,562.20, 42,177.78 and 19,980.36

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Solution

The fourth proportional to 30,562.20, 42,177.78 and 19,980.36 is: 27,574.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,562.20 : 42,177.78 = 19,980.36 : x
  2. Step 2: Convert to fraction form
    30,562.20/42,177.78 = 19,980.36/x
  3. Step 3: Cross multiply
    30,562.20x = 42,177.78 × 19,980.36
  4. Step 4: Simplify right side
    30,562.20x = 842,727,228.40
  5. Step 5: Solve for x
    x = 842,727,228.40/30,562.20
  6. Step 6: Final answer
    x = 27,574.17

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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.