Home / 15,065.39-20,787.63-8,690.56

Finding the Fourth Proportional to 15,065.39, 20,787.63 and 8,690.56

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Solution

The fourth proportional to 15,065.39, 20,787.63 and 8,690.56 is: 11,991.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.39 : 20,787.63 = 8,690.56 : x
  2. Step 2: Convert to fraction form
    15,065.39/20,787.63 = 8,690.56/x
  3. Step 3: Cross multiply
    15,065.39x = 20,787.63 × 8,690.56
  4. Step 4: Simplify right side
    15,065.39x = 180,656,145.77
  5. Step 5: Solve for x
    x = 180,656,145.77/15,065.39
  6. Step 6: Final answer
    x = 11,991.47

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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.