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Finding the Fourth Proportional to 12,957.56, 19,417.92 and 5,920.28

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Solution

The fourth proportional to 12,957.56, 19,417.92 and 5,920.28 is: 8,872.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,957.56 : 19,417.92 = 5,920.28 : x
  2. Step 2: Convert to fraction form
    12,957.56/19,417.92 = 5,920.28/x
  3. Step 3: Cross multiply
    12,957.56x = 19,417.92 × 5,920.28
  4. Step 4: Simplify right side
    12,957.56x = 114,959,523.42
  5. Step 5: Solve for x
    x = 114,959,523.42/12,957.56
  6. Step 6: Final answer
    x = 8,872.00

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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.