Home / 30,555.20-42,168.12-19,973.36

Finding the Fourth Proportional to 30,555.20, 42,168.12 and 19,973.36

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Solution

The fourth proportional to 30,555.20, 42,168.12 and 19,973.36 is: 27,564.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,555.20 : 42,168.12 = 19,973.36 : x
  2. Step 2: Convert to fraction form
    30,555.20/42,168.12 = 19,973.36/x
  3. Step 3: Cross multiply
    30,555.20x = 42,168.12 × 19,973.36
  4. Step 4: Simplify right side
    30,555.20x = 842,239,041.28
  5. Step 5: Solve for x
    x = 842,239,041.28/30,555.20
  6. Step 6: Final answer
    x = 27,564.51

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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.