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Finding the Fourth Proportional to 14,411.91, 19,888.43 and 7,787.91

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Solution

The fourth proportional to 14,411.91, 19,888.43 and 7,787.91 is: 10,747.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,411.91 : 19,888.43 = 7,787.91 : x
  2. Step 2: Convert to fraction form
    14,411.91/19,888.43 = 7,787.91/x
  3. Step 3: Cross multiply
    14,411.91x = 19,888.43 × 7,787.91
  4. Step 4: Simplify right side
    14,411.91x = 154,889,263.94
  5. Step 5: Solve for x
    x = 154,889,263.94/14,411.91
  6. Step 6: Final answer
    x = 10,747.31

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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.