Home / 12,787.18-19,208.71-9,113.02

Finding the Fourth Proportional to 12,787.18, 19,208.71 and 9,113.02

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Solution

The fourth proportional to 12,787.18, 19,208.71 and 9,113.02 is: 13,689.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.18 : 19,208.71 = 9,113.02 : x
  2. Step 2: Convert to fraction form
    12,787.18/19,208.71 = 9,113.02/x
  3. Step 3: Cross multiply
    12,787.18x = 19,208.71 × 9,113.02
  4. Step 4: Simplify right side
    12,787.18x = 175,049,358.40
  5. Step 5: Solve for x
    x = 175,049,358.40/12,787.18
  6. Step 6: Final answer
    x = 13,689.44

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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.