Home / 42,709.20-63,966.60-21,908.40

Finding the Fourth Proportional to 42,709.20, 63,966.60 and 21,908.40

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Solution

The fourth proportional to 42,709.20, 63,966.60 and 21,908.40 is: 32,812.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,709.20 : 63,966.60 = 21,908.40 : x
  2. Step 2: Convert to fraction form
    42,709.20/63,966.60 = 21,908.40/x
  3. Step 3: Cross multiply
    42,709.20x = 63,966.60 × 21,908.40
  4. Step 4: Simplify right side
    42,709.20x = 1,401,405,859.44
  5. Step 5: Solve for x
    x = 1,401,405,859.44/42,709.20
  6. Step 6: Final answer
    x = 32,812.74

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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.