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Finding the Fourth Proportional to 60,384.20, 90,576.30 and 20,928.20

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Solution

The fourth proportional to 60,384.20, 90,576.30 and 20,928.20 is: 31,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,384.20 : 90,576.30 = 20,928.20 : x
  2. Step 2: Convert to fraction form
    60,384.20/90,576.30 = 20,928.20/x
  3. Step 3: Cross multiply
    60,384.20x = 90,576.30 × 20,928.20
  4. Step 4: Simplify right side
    60,384.20x = 1,895,598,921.66
  5. Step 5: Solve for x
    x = 1,895,598,921.66/60,384.20
  6. Step 6: Final answer
    x = 31,392.30

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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.