Home / 42,428.20-63,642.30-33,615.40

Finding the Fourth Proportional to 42,428.20, 63,642.30 and 33,615.40

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Solution

The fourth proportional to 42,428.20, 63,642.30 and 33,615.40 is: 50,423.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,428.20 : 63,642.30 = 33,615.40 : x
  2. Step 2: Convert to fraction form
    42,428.20/63,642.30 = 33,615.40/x
  3. Step 3: Cross multiply
    42,428.20x = 63,642.30 × 33,615.40
  4. Step 4: Simplify right side
    42,428.20x = 2,139,361,371.42
  5. Step 5: Solve for x
    x = 2,139,361,371.42/42,428.20
  6. Step 6: Final answer
    x = 50,423.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.