Home / 30,772.08-42,433.20-18,194.40

Finding the Fourth Proportional to 30,772.08, 42,433.20 and 18,194.40

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Solution

The fourth proportional to 30,772.08, 42,433.20 and 18,194.40 is: 25,089.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,772.08 : 42,433.20 = 18,194.40 : x
  2. Step 2: Convert to fraction form
    30,772.08/42,433.20 = 18,194.40/x
  3. Step 3: Cross multiply
    30,772.08x = 42,433.20 × 18,194.40
  4. Step 4: Simplify right side
    30,772.08x = 772,046,614.08
  5. Step 5: Solve for x
    x = 772,046,614.08/30,772.08
  6. Step 6: Final answer
    x = 25,089.19

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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.