Home / 30,970.20-42,732.72-18,224.04

Finding the Fourth Proportional to 30,970.20, 42,732.72 and 18,224.04

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Solution

The fourth proportional to 30,970.20, 42,732.72 and 18,224.04 is: 25,145.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,970.20 : 42,732.72 = 18,224.04 : x
  2. Step 2: Convert to fraction form
    30,970.20/42,732.72 = 18,224.04/x
  3. Step 3: Cross multiply
    30,970.20x = 42,732.72 × 18,224.04
  4. Step 4: Simplify right side
    30,970.20x = 778,762,798.59
  5. Step 5: Solve for x
    x = 778,762,798.59/30,970.20
  6. Step 6: Final answer
    x = 25,145.55

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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.