Home / 15,479.87-21,362.64-9,106.88

Finding the Fourth Proportional to 15,479.87, 21,362.64 and 9,106.88

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Solution

The fourth proportional to 15,479.87, 21,362.64 and 9,106.88 is: 12,567.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.87 : 21,362.64 = 9,106.88 : x
  2. Step 2: Convert to fraction form
    15,479.87/21,362.64 = 9,106.88/x
  3. Step 3: Cross multiply
    15,479.87x = 21,362.64 × 9,106.88
  4. Step 4: Simplify right side
    15,479.87x = 194,546,998.96
  5. Step 5: Solve for x
    x = 194,546,998.96/15,479.87
  6. Step 6: Final answer
    x = 12,567.74

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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.