Home / 30,883.28-42,612.36-18,312.08

Finding the Fourth Proportional to 30,883.28, 42,612.36 and 18,312.08

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Solution

The fourth proportional to 30,883.28, 42,612.36 and 18,312.08 is: 25,266.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,883.28 : 42,612.36 = 18,312.08 : x
  2. Step 2: Convert to fraction form
    30,883.28/42,612.36 = 18,312.08/x
  3. Step 3: Cross multiply
    30,883.28x = 42,612.36 × 18,312.08
  4. Step 4: Simplify right side
    30,883.28x = 780,320,945.31
  5. Step 5: Solve for x
    x = 780,320,945.31/30,883.28
  6. Step 6: Final answer
    x = 25,266.78

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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.