Home / 30,455.87-42,024.29-19,680.98

Finding the Fourth Proportional to 30,455.87, 42,024.29 and 19,680.98

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Solution

The fourth proportional to 30,455.87, 42,024.29 and 19,680.98 is: 27,156.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,455.87 : 42,024.29 = 19,680.98 : x
  2. Step 2: Convert to fraction form
    30,455.87/42,024.29 = 19,680.98/x
  3. Step 3: Cross multiply
    30,455.87x = 42,024.29 × 19,680.98
  4. Step 4: Simplify right side
    30,455.87x = 827,078,902.48
  5. Step 5: Solve for x
    x = 827,078,902.48/30,455.87
  6. Step 6: Final answer
    x = 27,156.64

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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.