Home / 12,689.18-19,055.55-7,787.60

Finding the Fourth Proportional to 12,689.18, 19,055.55 and 7,787.60

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Solution

The fourth proportional to 12,689.18, 19,055.55 and 7,787.60 is: 11,694.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.18 : 19,055.55 = 7,787.60 : x
  2. Step 2: Convert to fraction form
    12,689.18/19,055.55 = 7,787.60/x
  3. Step 3: Cross multiply
    12,689.18x = 19,055.55 × 7,787.60
  4. Step 4: Simplify right side
    12,689.18x = 148,397,001.18
  5. Step 5: Solve for x
    x = 148,397,001.18/12,689.18
  6. Step 6: Final answer
    x = 11,694.77

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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.